./Ultimate.py --spec ../sv-benchmarks/c/properties/unreach-call.prp --file ../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c --full-output --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version 8c2bbc92 Calling Ultimate with: /usr/bin/java -Dosgi.configuration.area=/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/AutomizerReach.xml -i ../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c -s /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf --cacsl2boogietranslator.entry.function main --witnessprinter.witness.directory /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux --witnessprinter.witness.filename witness.graphml --witnessprinter.write.witness.besides.input.file false --witnessprinter.graph.data.specification CHECK( init(main()), LTL(G ! call(reach_error())) ) --witnessprinter.graph.data.producer Automizer --witnessprinter.graph.data.architecture 32bit --witnessprinter.graph.data.programhash 64ecef0c16969053cfa5e9d06400089ac2be3a4d ........................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................ Execution finished normally Writing output log to file Ultimate.log Result: TRUE --- Real Ultimate output --- This is Ultimate 0.2.1-dev-8c2bbc9 [2021-10-05 21:12:18,908 INFO L177 SettingsManager]: Resetting all preferences to default values... [2021-10-05 21:12:18,911 INFO L181 SettingsManager]: Resetting UltimateCore preferences to default values [2021-10-05 21:12:18,946 INFO L184 SettingsManager]: Ultimate Commandline Interface provides no preferences, ignoring... [2021-10-05 21:12:18,947 INFO L181 SettingsManager]: Resetting Boogie Preprocessor preferences to default values [2021-10-05 21:12:18,948 INFO L181 SettingsManager]: Resetting Boogie Procedure Inliner preferences to default values [2021-10-05 21:12:18,950 INFO L181 SettingsManager]: Resetting Abstract Interpretation preferences to default values [2021-10-05 21:12:18,952 INFO L181 SettingsManager]: Resetting LassoRanker preferences to default values [2021-10-05 21:12:18,954 INFO L181 SettingsManager]: Resetting Reaching Definitions preferences to default values [2021-10-05 21:12:18,955 INFO L181 SettingsManager]: Resetting SyntaxChecker preferences to default values [2021-10-05 21:12:18,956 INFO L181 SettingsManager]: Resetting Sifa preferences to default values [2021-10-05 21:12:18,958 INFO L184 SettingsManager]: Büchi Program Product provides no preferences, ignoring... [2021-10-05 21:12:18,958 INFO L181 SettingsManager]: Resetting LTL2Aut preferences to default values [2021-10-05 21:12:18,960 INFO L181 SettingsManager]: Resetting PEA to Boogie preferences to default values [2021-10-05 21:12:18,961 INFO L181 SettingsManager]: Resetting BlockEncodingV2 preferences to default values [2021-10-05 21:12:18,963 INFO L181 SettingsManager]: Resetting ChcToBoogie preferences to default values [2021-10-05 21:12:18,964 INFO L181 SettingsManager]: Resetting AutomataScriptInterpreter preferences to default values [2021-10-05 21:12:18,965 INFO L181 SettingsManager]: Resetting BuchiAutomizer preferences to default values [2021-10-05 21:12:18,967 INFO L181 SettingsManager]: Resetting CACSL2BoogieTranslator preferences to default values [2021-10-05 21:12:18,969 INFO L181 SettingsManager]: Resetting CodeCheck preferences to default values [2021-10-05 21:12:18,971 INFO L181 SettingsManager]: Resetting InvariantSynthesis preferences to default values [2021-10-05 21:12:18,973 INFO L181 SettingsManager]: Resetting RCFGBuilder preferences to default values [2021-10-05 21:12:18,974 INFO L181 SettingsManager]: Resetting Referee preferences to default values [2021-10-05 21:12:18,975 INFO L181 SettingsManager]: Resetting TraceAbstraction preferences to default values [2021-10-05 21:12:18,979 INFO L184 SettingsManager]: TraceAbstractionConcurrent provides no preferences, ignoring... [2021-10-05 21:12:18,979 INFO L184 SettingsManager]: TraceAbstractionWithAFAs provides no preferences, ignoring... [2021-10-05 21:12:18,980 INFO L181 SettingsManager]: Resetting TreeAutomizer preferences to default values [2021-10-05 21:12:18,982 INFO L181 SettingsManager]: Resetting IcfgToChc preferences to default values [2021-10-05 21:12:18,983 INFO L181 SettingsManager]: Resetting IcfgTransformer preferences to default values [2021-10-05 21:12:18,984 INFO L184 SettingsManager]: ReqToTest provides no preferences, ignoring... [2021-10-05 21:12:18,987 INFO L181 SettingsManager]: Resetting Boogie Printer preferences to default values [2021-10-05 21:12:18,988 INFO L181 SettingsManager]: Resetting ChcSmtPrinter preferences to default values [2021-10-05 21:12:18,989 INFO L181 SettingsManager]: Resetting ReqPrinter preferences to default values [2021-10-05 21:12:18,992 INFO L181 SettingsManager]: Resetting Witness Printer preferences to default values [2021-10-05 21:12:18,994 INFO L184 SettingsManager]: Boogie PL CUP Parser provides no preferences, ignoring... [2021-10-05 21:12:18,996 INFO L181 SettingsManager]: Resetting CDTParser preferences to default values [2021-10-05 21:12:18,997 INFO L184 SettingsManager]: AutomataScriptParser provides no preferences, ignoring... [2021-10-05 21:12:18,998 INFO L184 SettingsManager]: ReqParser provides no preferences, ignoring... [2021-10-05 21:12:18,998 INFO L181 SettingsManager]: Resetting SmtParser preferences to default values [2021-10-05 21:12:18,999 INFO L181 SettingsManager]: Resetting Witness Parser preferences to default values [2021-10-05 21:12:19,002 INFO L188 SettingsManager]: Finished resetting all preferences to default values... [2021-10-05 21:12:19,003 INFO L101 SettingsManager]: Beginning loading settings from /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2021-10-05 21:12:19,057 INFO L113 SettingsManager]: Loading preferences was successful [2021-10-05 21:12:19,057 INFO L115 SettingsManager]: Preferences different from defaults after loading the file: [2021-10-05 21:12:19,058 INFO L136 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2021-10-05 21:12:19,059 INFO L138 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2021-10-05 21:12:19,060 INFO L136 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2021-10-05 21:12:19,061 INFO L138 SettingsManager]: * Create parallel compositions if possible=false [2021-10-05 21:12:19,062 INFO L138 SettingsManager]: * Use SBE=true [2021-10-05 21:12:19,062 INFO L136 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2021-10-05 21:12:19,062 INFO L138 SettingsManager]: * sizeof long=4 [2021-10-05 21:12:19,062 INFO L138 SettingsManager]: * Overapproximate operations on floating types=true [2021-10-05 21:12:19,063 INFO L138 SettingsManager]: * sizeof POINTER=4 [2021-10-05 21:12:19,064 INFO L138 SettingsManager]: * Check division by zero=IGNORE [2021-10-05 21:12:19,064 INFO L138 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2021-10-05 21:12:19,064 INFO L138 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2021-10-05 21:12:19,064 INFO L138 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2021-10-05 21:12:19,065 INFO L138 SettingsManager]: * sizeof long double=12 [2021-10-05 21:12:19,065 INFO L138 SettingsManager]: * Check if freed pointer was valid=false [2021-10-05 21:12:19,065 INFO L138 SettingsManager]: * Use constant arrays=true [2021-10-05 21:12:19,065 INFO L138 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2021-10-05 21:12:19,066 INFO L136 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2021-10-05 21:12:19,066 INFO L138 SettingsManager]: * Size of a code block=SequenceOfStatements [2021-10-05 21:12:19,066 INFO L138 SettingsManager]: * SMT solver=External_DefaultMode [2021-10-05 21:12:19,066 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:12:19,067 INFO L136 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2021-10-05 21:12:19,067 INFO L138 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2021-10-05 21:12:19,067 INFO L138 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopsAndPotentialCycles [2021-10-05 21:12:19,067 INFO L138 SettingsManager]: * Trace refinement strategy=CAMEL [2021-10-05 21:12:19,068 INFO L138 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2021-10-05 21:12:19,068 INFO L138 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2021-10-05 21:12:19,068 INFO L138 SettingsManager]: * Trace refinement exception blacklist=NONE [2021-10-05 21:12:19,068 INFO L138 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness directory -> /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Witness filename -> witness.graphml Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Write witness besides input file -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data specification -> CHECK( init(main()), LTL(G ! call(reach_error())) ) Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data producer -> Automizer Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data architecture -> 32bit Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessprinter: Graph data programhash -> 64ecef0c16969053cfa5e9d06400089ac2be3a4d [2021-10-05 21:12:19,492 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2021-10-05 21:12:19,520 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2021-10-05 21:12:19,523 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2021-10-05 21:12:19,524 INFO L271 PluginConnector]: Initializing CDTParser... [2021-10-05 21:12:19,525 INFO L275 PluginConnector]: CDTParser initialized [2021-10-05 21:12:19,526 INFO L432 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/../sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-05 21:12:19,594 INFO L220 CDTParser]: Created temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c6925e4a/15ea9213471e4ae182a2ece1b5a05ede/FLAGf702b77c5 [2021-10-05 21:12:20,312 INFO L306 CDTParser]: Found 1 translation units. [2021-10-05 21:12:20,312 INFO L160 CDTParser]: Scanning /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c [2021-10-05 21:12:20,321 INFO L349 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c6925e4a/15ea9213471e4ae182a2ece1b5a05ede/FLAGf702b77c5 [2021-10-05 21:12:20,655 INFO L357 CDTParser]: Successfully deleted /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/data/4c6925e4a/15ea9213471e4ae182a2ece1b5a05ede [2021-10-05 21:12:20,661 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2021-10-05 21:12:20,670 INFO L131 ToolchainWalker]: Walking toolchain with 6 elements. [2021-10-05 21:12:20,672 INFO L113 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2021-10-05 21:12:20,673 INFO L271 PluginConnector]: Initializing CACSL2BoogieTranslator... [2021-10-05 21:12:20,677 INFO L275 PluginConnector]: CACSL2BoogieTranslator initialized [2021-10-05 21:12:20,678 INFO L185 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,680 INFO L205 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@46a8ed94 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20, skipping insertion in model container [2021-10-05 21:12:20,680 INFO L185 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,688 INFO L145 MainTranslator]: Starting translation in SV-COMP mode [2021-10-05 21:12:20,709 INFO L178 MainTranslator]: Built tables and reachable declarations [2021-10-05 21:12:20,872 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c[2035,2048] [2021-10-05 21:12:20,877 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:12:20,887 INFO L203 MainTranslator]: Completed pre-run [2021-10-05 21:12:20,909 WARN L228 ndardFunctionHandler]: Function reach_error is already implemented but we override the implementation for the call at /storage/repos/ultimate-2/releaseScripts/default/sv-benchmarks/c/weaver/popl20/figure1-alt.wvr.c[2035,2048] [2021-10-05 21:12:20,911 INFO L206 PostProcessor]: Analyzing one entry point: main [2021-10-05 21:12:20,927 INFO L208 MainTranslator]: Completed translation [2021-10-05 21:12:20,928 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20 WrapperNode [2021-10-05 21:12:20,928 INFO L132 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2021-10-05 21:12:20,930 INFO L113 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2021-10-05 21:12:20,930 INFO L271 PluginConnector]: Initializing Boogie Procedure Inliner... [2021-10-05 21:12:20,930 INFO L275 PluginConnector]: Boogie Procedure Inliner initialized [2021-10-05 21:12:20,940 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,949 INFO L185 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,972 INFO L132 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2021-10-05 21:12:20,973 INFO L113 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2021-10-05 21:12:20,974 INFO L271 PluginConnector]: Initializing Boogie Preprocessor... [2021-10-05 21:12:20,974 INFO L275 PluginConnector]: Boogie Preprocessor initialized [2021-10-05 21:12:20,984 INFO L185 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,984 INFO L185 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,987 INFO L185 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,987 INFO L185 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,993 INFO L185 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,997 INFO L185 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:20,999 INFO L185 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:21,002 INFO L132 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2021-10-05 21:12:21,003 INFO L113 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2021-10-05 21:12:21,004 INFO L271 PluginConnector]: Initializing RCFGBuilder... [2021-10-05 21:12:21,004 INFO L275 PluginConnector]: RCFGBuilder initialized [2021-10-05 21:12:21,005 INFO L185 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (1/1) ... [2021-10-05 21:12:21,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 [2021-10-05 21:12:21,029 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:21,049 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (exit command is (exit), workingDir is null) [2021-10-05 21:12:21,070 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Waiting until timeout for monitored process [2021-10-05 21:12:21,125 INFO L130 BoogieDeclarations]: Found specification of procedure thread1 [2021-10-05 21:12:21,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread1 [2021-10-05 21:12:21,126 INFO L130 BoogieDeclarations]: Found specification of procedure thread2 [2021-10-05 21:12:21,126 INFO L138 BoogieDeclarations]: Found implementation of procedure thread2 [2021-10-05 21:12:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int [2021-10-05 21:12:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocOnStack [2021-10-05 21:12:21,127 INFO L130 BoogieDeclarations]: Found specification of procedure write~int [2021-10-05 21:12:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2021-10-05 21:12:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2021-10-05 21:12:21,128 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2021-10-05 21:12:21,129 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2021-10-05 21:12:21,129 INFO L130 BoogieDeclarations]: Found specification of procedure read~int [2021-10-05 21:12:21,130 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.dealloc [2021-10-05 21:12:21,132 WARN L209 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to SingleStatement [2021-10-05 21:12:21,610 INFO L294 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2021-10-05 21:12:21,610 INFO L299 CfgBuilder]: Removed 12 assume(true) statements. [2021-10-05 21:12:21,613 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:12:21 BoogieIcfgContainer [2021-10-05 21:12:21,614 INFO L132 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2021-10-05 21:12:21,616 INFO L113 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2021-10-05 21:12:21,616 INFO L271 PluginConnector]: Initializing TraceAbstraction... [2021-10-05 21:12:21,620 INFO L275 PluginConnector]: TraceAbstraction initialized [2021-10-05 21:12:21,620 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 05.10 09:12:20" (1/3) ... [2021-10-05 21:12:21,621 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56209615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:12:21, skipping insertion in model container [2021-10-05 21:12:21,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 05.10 09:12:20" (2/3) ... [2021-10-05 21:12:21,622 INFO L205 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@56209615 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 05.10 09:12:21, skipping insertion in model container [2021-10-05 21:12:21,622 INFO L185 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:12:21" (3/3) ... [2021-10-05 21:12:21,625 INFO L111 eAbstractionObserver]: Analyzing ICFG figure1-alt.wvr.c [2021-10-05 21:12:21,632 WARN L149 ceAbstractionStarter]: Switching off computation of Hoare annotation because input is a concurrent program [2021-10-05 21:12:21,633 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2021-10-05 21:12:21,633 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 1 error locations. [2021-10-05 21:12:21,633 INFO L516 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2021-10-05 21:12:21,688 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,688 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,689 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,690 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,691 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,691 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,692 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,697 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,697 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,698 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,698 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,699 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,699 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,699 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,700 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,700 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,701 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,702 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,704 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,705 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,705 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,706 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,706 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,707 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,707 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,708 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,709 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,709 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,710 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,710 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,712 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,712 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,713 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,714 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,714 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,714 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,715 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,715 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,725 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,726 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post3| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,726 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#t~post4| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,727 WARN L313 ript$VariableManager]: TermVariabe thread1Thread1of1ForFork0_~i~0 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,727 WARN L313 ript$VariableManager]: TermVariabe |thread1Thread1of1ForFork0_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,734 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post5| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,735 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.offset| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,735 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_~i~1 not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,736 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#res.base| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,736 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_assume_abort_if_not_#in~cond| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,737 WARN L313 ript$VariableManager]: TermVariabe |thread2Thread1of1ForFork1_#t~post6| not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,737 WARN L313 ript$VariableManager]: TermVariabe thread2Thread1of1ForFork1_assume_abort_if_not_~cond not constructed by VariableManager. Cannot ensure absence of name clashes. [2021-10-05 21:12:21,750 INFO L148 ThreadInstanceAdder]: Constructed 2 joinOtherThreadTransitions. [2021-10-05 21:12:21,824 INFO L338 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2021-10-05 21:12:21,846 INFO L339 AbstractCegarLoop]: Settings: SEPARATE_VIOLATION_CHECK=true, mInterprocedural=true, mMaxIterations=1000000, mWatchIteration=1000000, mArtifact=RCFG, mInterpolation=FPandBP, mInterpolantAutomaton=STRAIGHT_LINE, mDumpAutomata=false, mAutomataFormat=ATS_NUMERATE, mDumpPath=., mDeterminiation=PREDICATE_ABSTRACTION, mMinimize=MINIMIZE_SEVPA, mHoare=true, mConcurrency=FINITE_AUTOMATA, mHoareTripleChecks=INCREMENTAL, mHoareAnnotationPositions=LoopsAndPotentialCycles, mDumpOnlyReuseAutomata=false, mLimitTraceHistogram=0, mErrorLocTimeLimit=0, mLimitPathProgramCount=0, mCollectInterpolantStatistics=true, mHeuristicEmptinessCheck=false, mHeuristicEmptinessCheckAStarHeuristic=ZERO, mHeuristicEmptinessCheckAStarHeuristicRandomSeed=1337, mHeuristicEmptinessCheckSmtFeatureScoringMethod=DAGSIZE, mSMTFeatureExtraction=false, mSMTFeatureExtractionDumpPath=., mOverrideInterpolantAutomaton=false, mMcrInterpolantMethod=WP, mLoopAccelerationTechnique=FAST_UPR [2021-10-05 21:12:21,847 INFO L340 AbstractCegarLoop]: Starting to check reachability of 3 error locations. [2021-10-05 21:12:21,867 INFO L118 etLargeBlockEncoding]: Petri net LBE is using semantic-based independence relation. [2021-10-05 21:12:21,883 INFO L133 etLargeBlockEncoding]: Starting large block encoding on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-05 21:12:21,888 INFO L110 LiptonReduction]: Starting Lipton reduction on Petri net that has 77 places, 76 transitions, 168 flow [2021-10-05 21:12:21,891 INFO L74 FinitePrefix]: Start finitePrefix. Operand has 77 places, 76 transitions, 168 flow [2021-10-05 21:12:21,968 INFO L129 PetriNetUnfolder]: 6/74 cut-off events. [2021-10-05 21:12:21,969 INFO L130 PetriNetUnfolder]: For 2/2 co-relation queries the response was YES. [2021-10-05 21:12:21,973 INFO L84 FinitePrefix]: Finished finitePrefix Result has 83 conditions, 74 events. 6/74 cut-off events. For 2/2 co-relation queries the response was YES. Maximal size of possible extension queue 3. Compared 45 event pairs, 0 based on Foata normal form. 0/67 useless extension candidates. Maximal degree in co-relation 45. Up to 2 conditions per place. [2021-10-05 21:12:21,976 INFO L116 LiptonReduction]: Number of co-enabled transitions 432 [2021-10-05 21:12:25,107 INFO L131 LiptonReduction]: Checked pairs total: 452 [2021-10-05 21:12:25,107 INFO L133 LiptonReduction]: Total number of compositions: 67 [2021-10-05 21:12:25,117 INFO L111 iNet2FiniteAutomaton]: Start petriNet2FiniteAutomaton. Operand has 23 places, 18 transitions, 52 flow [2021-10-05 21:12:25,131 INFO L133 iNet2FiniteAutomaton]: Finished petriNet2FiniteAutomaton. Result has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:25,133 INFO L276 IsEmpty]: Start isEmpty. Operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:25,140 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:25,141 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:25,142 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:25,142 INFO L402 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:25,148 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:25,148 INFO L82 PathProgramCache]: Analyzing trace with hash 1028856231, now seen corresponding path program 1 times [2021-10-05 21:12:25,168 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:25,169 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [713437257] [2021-10-05 21:12:25,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:25,170 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:25,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:25,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:25,667 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:25,667 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [713437257] [2021-10-05 21:12:25,668 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [713437257] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:25,668 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:25,669 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:25,670 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [410732119] [2021-10-05 21:12:25,675 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:25,675 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:25,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:25,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:25,694 INFO L87 Difference]: Start difference. First operand has 34 states, 33 states have (on average 2.212121212121212) internal successors, (73), 33 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:25,850 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:25,851 INFO L93 Difference]: Finished difference Result 71 states and 150 transitions. [2021-10-05 21:12:25,851 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:25,853 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:25,854 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:25,864 INFO L225 Difference]: With dead ends: 71 [2021-10-05 21:12:25,865 INFO L226 Difference]: Without dead ends: 66 [2021-10-05 21:12:25,866 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 124.2ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-05 21:12:25,884 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 66 states. [2021-10-05 21:12:25,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 66 to 48. [2021-10-05 21:12:25,905 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 48 states, 47 states have (on average 2.1702127659574466) internal successors, (102), 47 states have internal predecessors, (102), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:25,907 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 48 states to 48 states and 102 transitions. [2021-10-05 21:12:25,908 INFO L78 Accepts]: Start accepts. Automaton has 48 states and 102 transitions. Word has length 13 [2021-10-05 21:12:25,908 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:25,909 INFO L470 AbstractCegarLoop]: Abstraction has 48 states and 102 transitions. [2021-10-05 21:12:25,909 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:25,909 INFO L276 IsEmpty]: Start isEmpty. Operand 48 states and 102 transitions. [2021-10-05 21:12:25,910 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:25,911 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:25,911 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:25,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2021-10-05 21:12:25,912 INFO L402 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:25,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:25,913 INFO L82 PathProgramCache]: Analyzing trace with hash -810634497, now seen corresponding path program 2 times [2021-10-05 21:12:25,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:25,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [482490582] [2021-10-05 21:12:25,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:25,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:25,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:26,234 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:26,234 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:26,235 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [482490582] [2021-10-05 21:12:26,235 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [482490582] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:26,235 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:26,236 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:26,236 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656300379] [2021-10-05 21:12:26,237 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:26,238 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:26,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:26,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:26,239 INFO L87 Difference]: Start difference. First operand 48 states and 102 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,345 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:26,345 INFO L93 Difference]: Finished difference Result 85 states and 176 transitions. [2021-10-05 21:12:26,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:26,346 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:26,346 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:26,348 INFO L225 Difference]: With dead ends: 85 [2021-10-05 21:12:26,348 INFO L226 Difference]: Without dead ends: 80 [2021-10-05 21:12:26,349 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 85.5ms TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:12:26,349 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-05 21:12:26,356 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 50. [2021-10-05 21:12:26,357 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 50 states, 49 states have (on average 2.2653061224489797) internal successors, (111), 49 states have internal predecessors, (111), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 50 states to 50 states and 111 transitions. [2021-10-05 21:12:26,358 INFO L78 Accepts]: Start accepts. Automaton has 50 states and 111 transitions. Word has length 13 [2021-10-05 21:12:26,359 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:26,360 INFO L470 AbstractCegarLoop]: Abstraction has 50 states and 111 transitions. [2021-10-05 21:12:26,360 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,360 INFO L276 IsEmpty]: Start isEmpty. Operand 50 states and 111 transitions. [2021-10-05 21:12:26,361 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:26,361 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:26,361 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:26,362 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2021-10-05 21:12:26,362 INFO L402 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:26,362 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:26,362 INFO L82 PathProgramCache]: Analyzing trace with hash 1766583739, now seen corresponding path program 3 times [2021-10-05 21:12:26,363 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:26,363 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271871930] [2021-10-05 21:12:26,363 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:26,363 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:26,392 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:26,598 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:26,600 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:26,601 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271871930] [2021-10-05 21:12:26,601 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271871930] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:26,601 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:26,602 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:26,602 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [247373473] [2021-10-05 21:12:26,603 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:26,603 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:26,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:26,609 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:26,610 INFO L87 Difference]: Start difference. First operand 50 states and 111 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,705 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:26,705 INFO L93 Difference]: Finished difference Result 75 states and 160 transitions. [2021-10-05 21:12:26,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:26,706 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:26,706 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:26,708 INFO L225 Difference]: With dead ends: 75 [2021-10-05 21:12:26,708 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 21:12:26,708 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 78.7ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:12:26,709 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 21:12:26,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 52. [2021-10-05 21:12:26,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 52 states, 51 states have (on average 2.235294117647059) internal successors, (114), 51 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 52 states to 52 states and 114 transitions. [2021-10-05 21:12:26,717 INFO L78 Accepts]: Start accepts. Automaton has 52 states and 114 transitions. Word has length 13 [2021-10-05 21:12:26,718 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:26,718 INFO L470 AbstractCegarLoop]: Abstraction has 52 states and 114 transitions. [2021-10-05 21:12:26,718 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:26,718 INFO L276 IsEmpty]: Start isEmpty. Operand 52 states and 114 transitions. [2021-10-05 21:12:26,720 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:26,720 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:26,720 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:26,720 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2021-10-05 21:12:26,721 INFO L402 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:26,721 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:26,722 INFO L82 PathProgramCache]: Analyzing trace with hash 1066742439, now seen corresponding path program 4 times [2021-10-05 21:12:26,722 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:26,722 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496197859] [2021-10-05 21:12:26,722 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:26,723 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:26,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:26,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:26,926 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:26,926 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496197859] [2021-10-05 21:12:26,926 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496197859] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:26,926 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:26,927 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:26,927 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1711292006] [2021-10-05 21:12:26,928 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:26,928 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:26,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:26,929 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=22, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:26,929 INFO L87 Difference]: Start difference. First operand 52 states and 114 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,022 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:27,023 INFO L93 Difference]: Finished difference Result 75 states and 158 transitions. [2021-10-05 21:12:27,023 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:27,029 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:27,029 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:27,030 INFO L225 Difference]: With dead ends: 75 [2021-10-05 21:12:27,031 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 21:12:27,031 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 83.4ms TimeCoverageRelationStatistics Valid=27, Invalid=29, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:12:27,032 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 21:12:27,037 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 56. [2021-10-05 21:12:27,038 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.3636363636363638) internal successors, (130), 55 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,039 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 130 transitions. [2021-10-05 21:12:27,039 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 130 transitions. Word has length 13 [2021-10-05 21:12:27,039 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:27,039 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 130 transitions. [2021-10-05 21:12:27,040 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,040 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 130 transitions. [2021-10-05 21:12:27,041 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:27,041 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:27,041 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:27,042 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2021-10-05 21:12:27,042 INFO L402 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:27,042 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:27,043 INFO L82 PathProgramCache]: Analyzing trace with hash -651006621, now seen corresponding path program 5 times [2021-10-05 21:12:27,043 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:27,043 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [705444638] [2021-10-05 21:12:27,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:27,044 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:27,065 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:27,245 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:27,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:27,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [705444638] [2021-10-05 21:12:27,246 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [705444638] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:27,246 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:27,246 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:27,246 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [913190692] [2021-10-05 21:12:27,247 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:27,248 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:27,249 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:27,249 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:27,250 INFO L87 Difference]: Start difference. First operand 56 states and 130 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,347 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:27,348 INFO L93 Difference]: Finished difference Result 77 states and 159 transitions. [2021-10-05 21:12:27,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:27,351 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:27,351 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:27,354 INFO L225 Difference]: With dead ends: 77 [2021-10-05 21:12:27,354 INFO L226 Difference]: Without dead ends: 72 [2021-10-05 21:12:27,355 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 6 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 6 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 84.5ms TimeCoverageRelationStatistics Valid=26, Invalid=30, Unknown=0, NotChecked=0, Total=56 [2021-10-05 21:12:27,355 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 72 states. [2021-10-05 21:12:27,369 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 72 to 54. [2021-10-05 21:12:27,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.2830188679245285) internal successors, (121), 53 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,373 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 121 transitions. [2021-10-05 21:12:27,374 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 121 transitions. Word has length 13 [2021-10-05 21:12:27,374 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:27,374 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 121 transitions. [2021-10-05 21:12:27,374 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,375 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 121 transitions. [2021-10-05 21:12:27,376 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 14 [2021-10-05 21:12:27,376 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:27,376 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:27,376 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2021-10-05 21:12:27,377 INFO L402 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:27,377 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:27,377 INFO L82 PathProgramCache]: Analyzing trace with hash -1709087561, now seen corresponding path program 6 times [2021-10-05 21:12:27,378 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:27,378 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703609479] [2021-10-05 21:12:27,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:27,378 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:27,398 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:27,546 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:27,546 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:27,547 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703609479] [2021-10-05 21:12:27,547 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703609479] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:27,547 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:27,547 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2021-10-05 21:12:27,548 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567057532] [2021-10-05 21:12:27,548 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2021-10-05 21:12:27,548 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:27,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2021-10-05 21:12:27,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2021-10-05 21:12:27,550 INFO L87 Difference]: Start difference. First operand 54 states and 121 transitions. Second operand has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,650 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:27,650 INFO L93 Difference]: Finished difference Result 63 states and 133 transitions. [2021-10-05 21:12:27,650 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2021-10-05 21:12:27,651 INFO L78 Accepts]: Start accepts. Automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 13 [2021-10-05 21:12:27,651 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:27,651 INFO L225 Difference]: With dead ends: 63 [2021-10-05 21:12:27,651 INFO L226 Difference]: Without dead ends: 58 [2021-10-05 21:12:27,652 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 7 GetRequests, 0 SyntacticMatches, 0 SemanticMatches, 7 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 1 ImplicationChecksByTransitivity, 107.2ms TimeCoverageRelationStatistics Valid=33, Invalid=39, Unknown=0, NotChecked=0, Total=72 [2021-10-05 21:12:27,652 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 58 states. [2021-10-05 21:12:27,656 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 58 to 56. [2021-10-05 21:12:27,657 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 56 states, 55 states have (on average 2.2545454545454544) internal successors, (124), 55 states have internal predecessors, (124), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,658 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 56 states to 56 states and 124 transitions. [2021-10-05 21:12:27,658 INFO L78 Accepts]: Start accepts. Automaton has 56 states and 124 transitions. Word has length 13 [2021-10-05 21:12:27,658 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:27,659 INFO L470 AbstractCegarLoop]: Abstraction has 56 states and 124 transitions. [2021-10-05 21:12:27,659 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 6 states have (on average 2.1666666666666665) internal successors, (13), 6 states have internal predecessors, (13), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,659 INFO L276 IsEmpty]: Start isEmpty. Operand 56 states and 124 transitions. [2021-10-05 21:12:27,660 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:27,660 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:27,660 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:27,661 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2021-10-05 21:12:27,661 INFO L402 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:27,662 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:27,662 INFO L82 PathProgramCache]: Analyzing trace with hash -419627156, now seen corresponding path program 1 times [2021-10-05 21:12:27,662 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:27,662 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [151801797] [2021-10-05 21:12:27,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:27,663 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:27,707 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:27,739 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 1 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:27,739 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:27,740 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [151801797] [2021-10-05 21:12:27,740 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [151801797] provided 1 perfect and 0 imperfect interpolant sequences [2021-10-05 21:12:27,740 INFO L186 FreeRefinementEngine]: Constructing automaton from 1 perfect and 0 imperfect interpolant sequences. [2021-10-05 21:12:27,740 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2021-10-05 21:12:27,741 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630472887] [2021-10-05 21:12:27,741 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2021-10-05 21:12:27,741 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:27,742 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2021-10-05 21:12:27,742 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:12:27,743 INFO L87 Difference]: Start difference. First operand 56 states and 124 transitions. Second operand has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,747 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:27,747 INFO L93 Difference]: Finished difference Result 52 states and 106 transitions. [2021-10-05 21:12:27,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2021-10-05 21:12:27,748 INFO L78 Accepts]: Start accepts. Automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:27,748 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:27,749 INFO L225 Difference]: With dead ends: 52 [2021-10-05 21:12:27,749 INFO L226 Difference]: Without dead ends: 42 [2021-10-05 21:12:27,750 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 2 GetRequests, 1 SyntacticMatches, 0 SemanticMatches, 1 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 0 ImplicationChecksByTransitivity, 1.5ms TimeCoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2021-10-05 21:12:27,750 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 42 states. [2021-10-05 21:12:27,752 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 42 to 42. [2021-10-05 21:12:27,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 42 states, 41 states have (on average 2.1463414634146343) internal successors, (88), 41 states have internal predecessors, (88), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,754 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 42 states to 42 states and 88 transitions. [2021-10-05 21:12:27,754 INFO L78 Accepts]: Start accepts. Automaton has 42 states and 88 transitions. Word has length 14 [2021-10-05 21:12:27,754 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:27,754 INFO L470 AbstractCegarLoop]: Abstraction has 42 states and 88 transitions. [2021-10-05 21:12:27,755 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 4.666666666666667) internal successors, (14), 2 states have internal predecessors, (14), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:27,755 INFO L276 IsEmpty]: Start isEmpty. Operand 42 states and 88 transitions. [2021-10-05 21:12:27,756 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:27,756 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:27,756 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:27,756 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2021-10-05 21:12:27,757 INFO L402 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:27,757 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:27,757 INFO L82 PathProgramCache]: Analyzing trace with hash 1268318728, now seen corresponding path program 1 times [2021-10-05 21:12:27,758 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:27,758 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [137250346] [2021-10-05 21:12:27,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:27,758 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:27,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:27,900 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:27,900 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:27,900 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [137250346] [2021-10-05 21:12:27,901 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [137250346] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:27,901 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1161811026] [2021-10-05 21:12:27,901 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:27,902 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:27,902 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:27,904 INFO L229 MonitoredProcess]: Starting monitored process 2 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:27,924 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Waiting until timeout for monitored process [2021-10-05 21:12:27,973 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:27,976 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:27,982 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:28,320 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:28,321 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1161811026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:28,321 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:28,321 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:28,321 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1775855531] [2021-10-05 21:12:28,322 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:28,322 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:28,323 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:28,323 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:28,323 INFO L87 Difference]: Start difference. First operand 42 states and 88 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:28,500 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:28,500 INFO L93 Difference]: Finished difference Result 89 states and 179 transitions. [2021-10-05 21:12:28,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:12:28,501 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:28,501 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:28,502 INFO L225 Difference]: With dead ends: 89 [2021-10-05 21:12:28,503 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 21:12:28,503 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 37 ImplicationChecksByTransitivity, 216.1ms TimeCoverageRelationStatistics Valid=75, Invalid=197, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:12:28,504 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 21:12:28,508 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 68. [2021-10-05 21:12:28,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.253731343283582) internal successors, (151), 67 states have internal predecessors, (151), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:28,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 151 transitions. [2021-10-05 21:12:28,509 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 151 transitions. Word has length 14 [2021-10-05 21:12:28,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:28,510 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 151 transitions. [2021-10-05 21:12:28,510 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:28,511 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 151 transitions. [2021-10-05 21:12:28,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:28,512 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:28,512 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:28,554 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (2)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:28,727 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7,2 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:28,728 INFO L402 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:28,729 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:28,730 INFO L82 PathProgramCache]: Analyzing trace with hash -571172000, now seen corresponding path program 2 times [2021-10-05 21:12:28,730 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:28,730 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [51725412] [2021-10-05 21:12:28,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:28,731 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:28,750 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:28,858 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:28,859 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:28,859 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [51725412] [2021-10-05 21:12:28,859 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [51725412] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:28,860 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1719890192] [2021-10-05 21:12:28,860 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:12:28,860 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:28,860 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:28,862 INFO L229 MonitoredProcess]: Starting monitored process 3 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:28,873 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Waiting until timeout for monitored process [2021-10-05 21:12:28,944 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:28,944 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:28,946 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:28,947 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:29,219 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:29,219 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1719890192] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:29,219 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:29,219 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:29,220 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1193864287] [2021-10-05 21:12:29,220 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:29,220 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:29,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:29,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=41, Invalid=141, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:29,222 INFO L87 Difference]: Start difference. First operand 68 states and 151 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:29,476 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:29,476 INFO L93 Difference]: Finished difference Result 121 states and 237 transitions. [2021-10-05 21:12:29,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:12:29,477 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:29,477 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:29,478 INFO L225 Difference]: With dead ends: 121 [2021-10-05 21:12:29,478 INFO L226 Difference]: Without dead ends: 116 [2021-10-05 21:12:29,479 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 52 ImplicationChecksByTransitivity, 251.0ms TimeCoverageRelationStatistics Valid=83, Invalid=259, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:12:29,479 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-05 21:12:29,483 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 72. [2021-10-05 21:12:29,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:29,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-05 21:12:29,485 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-05 21:12:29,485 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:29,485 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-05 21:12:29,485 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:29,485 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-05 21:12:29,486 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:29,486 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:29,487 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:29,525 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (3)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:29,687 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8,3 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:29,688 INFO L402 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:29,689 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:29,689 INFO L82 PathProgramCache]: Analyzing trace with hash 2006046236, now seen corresponding path program 3 times [2021-10-05 21:12:29,690 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:29,690 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [297324664] [2021-10-05 21:12:29,691 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:29,691 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:29,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:29,821 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:29,822 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:29,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [297324664] [2021-10-05 21:12:29,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [297324664] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:29,822 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1392967433] [2021-10-05 21:12:29,823 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:12:29,823 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:29,823 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:29,824 INFO L229 MonitoredProcess]: Starting monitored process 4 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:29,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Waiting until timeout for monitored process [2021-10-05 21:12:29,913 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:12:29,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:29,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:29,917 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:30,190 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:30,193 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1392967433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:30,193 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:30,194 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:30,194 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [138887494] [2021-10-05 21:12:30,194 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:30,195 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:30,195 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:30,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=138, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:30,196 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:30,435 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:30,435 INFO L93 Difference]: Finished difference Result 119 states and 231 transitions. [2021-10-05 21:12:30,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:12:30,436 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:30,436 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:30,438 INFO L225 Difference]: With dead ends: 119 [2021-10-05 21:12:30,438 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 21:12:30,438 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 62 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=97, Invalid=283, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:12:30,439 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 21:12:30,451 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-10-05 21:12:30,452 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.323943661971831) internal successors, (165), 71 states have internal predecessors, (165), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:30,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 165 transitions. [2021-10-05 21:12:30,454 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 165 transitions. Word has length 14 [2021-10-05 21:12:30,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:30,456 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 165 transitions. [2021-10-05 21:12:30,456 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:30,457 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 165 transitions. [2021-10-05 21:12:30,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:30,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:30,459 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:30,496 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (4)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:30,674 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9,4 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:30,675 INFO L402 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:30,676 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:30,676 INFO L82 PathProgramCache]: Analyzing trace with hash -1772714738, now seen corresponding path program 4 times [2021-10-05 21:12:30,677 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:30,677 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [320791798] [2021-10-05 21:12:30,677 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:30,678 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:30,696 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:30,781 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:30,781 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:30,781 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [320791798] [2021-10-05 21:12:30,781 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [320791798] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:30,782 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [235850211] [2021-10-05 21:12:30,782 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:12:30,782 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:30,782 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:30,784 INFO L229 MonitoredProcess]: Starting monitored process 5 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:30,793 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Waiting until timeout for monitored process [2021-10-05 21:12:30,883 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:12:30,883 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:30,884 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:30,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:31,155 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:31,156 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [235850211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:31,156 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:31,156 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:31,156 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2038586992] [2021-10-05 21:12:31,157 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:31,157 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:31,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:31,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=48, Invalid=134, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:31,158 INFO L87 Difference]: Start difference. First operand 72 states and 165 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:31,274 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:31,274 INFO L93 Difference]: Finished difference Result 83 states and 180 transitions. [2021-10-05 21:12:31,274 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:12:31,275 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:31,275 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:31,276 INFO L225 Difference]: With dead ends: 83 [2021-10-05 21:12:31,276 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 21:12:31,276 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 22 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 169.8ms TimeCoverageRelationStatistics Valid=74, Invalid=198, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:12:31,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 21:12:31,280 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 74. [2021-10-05 21:12:31,280 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3013698630136985) internal successors, (168), 73 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 168 transitions. [2021-10-05 21:12:31,281 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 168 transitions. Word has length 14 [2021-10-05 21:12:31,281 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:31,281 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 168 transitions. [2021-10-05 21:12:31,281 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:31,282 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 168 transitions. [2021-10-05 21:12:31,282 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:31,282 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:31,282 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:31,322 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (5)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:31,495 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 5 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable10 [2021-10-05 21:12:31,496 INFO L402 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:31,496 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:31,497 INFO L82 PathProgramCache]: Analyzing trace with hash -1204252256, now seen corresponding path program 5 times [2021-10-05 21:12:31,497 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:31,498 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1803792889] [2021-10-05 21:12:31,498 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:31,498 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:31,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:31,653 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:31,653 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:31,653 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1803792889] [2021-10-05 21:12:31,654 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1803792889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:31,654 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1496764735] [2021-10-05 21:12:31,654 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:12:31,654 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:31,654 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:31,655 INFO L229 MonitoredProcess]: Starting monitored process 6 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:31,679 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Waiting until timeout for monitored process [2021-10-05 21:12:31,775 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:31,775 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:31,777 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:31,778 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:32,045 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:32,045 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1496764735] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:32,046 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:32,046 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:32,046 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1186239150] [2021-10-05 21:12:32,046 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:32,046 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:32,047 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:32,047 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=142, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:32,047 INFO L87 Difference]: Start difference. First operand 74 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:32,272 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:32,272 INFO L93 Difference]: Finished difference Result 103 states and 209 transitions. [2021-10-05 21:12:32,272 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:12:32,272 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:32,273 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:32,274 INFO L225 Difference]: With dead ends: 103 [2021-10-05 21:12:32,274 INFO L226 Difference]: Without dead ends: 98 [2021-10-05 21:12:32,274 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 63 ImplicationChecksByTransitivity, 230.2ms TimeCoverageRelationStatistics Valid=77, Invalid=265, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:12:32,275 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 98 states. [2021-10-05 21:12:32,277 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 98 to 70. [2021-10-05 21:12:32,278 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 69 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:32,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 157 transitions. [2021-10-05 21:12:32,279 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 157 transitions. Word has length 14 [2021-10-05 21:12:32,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:32,279 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 157 transitions. [2021-10-05 21:12:32,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:32,279 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 157 transitions. [2021-10-05 21:12:32,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:32,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:32,280 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:32,314 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (6)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:32,481 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11,6 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:32,481 INFO L402 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:32,482 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:32,483 INFO L82 PathProgramCache]: Analyzing trace with hash 1372965980, now seen corresponding path program 6 times [2021-10-05 21:12:32,483 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:32,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975457795] [2021-10-05 21:12:32,484 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:32,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:32,504 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:32,630 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:32,631 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:32,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975457795] [2021-10-05 21:12:32,631 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975457795] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:32,631 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [743726889] [2021-10-05 21:12:32,632 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:12:32,632 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:32,632 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:32,633 INFO L229 MonitoredProcess]: Starting monitored process 7 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:32,640 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Waiting until timeout for monitored process [2021-10-05 21:12:32,788 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:12:32,788 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:32,789 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:32,790 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:33,063 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:33,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [743726889] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:33,064 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:33,064 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:33,064 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101545189] [2021-10-05 21:12:33,067 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:33,067 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:33,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:33,069 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=140, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:33,069 INFO L87 Difference]: Start difference. First operand 70 states and 157 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:33,296 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:33,297 INFO L93 Difference]: Finished difference Result 107 states and 213 transitions. [2021-10-05 21:12:33,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:33,297 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:33,298 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:33,299 INFO L225 Difference]: With dead ends: 107 [2021-10-05 21:12:33,299 INFO L226 Difference]: Without dead ends: 102 [2021-10-05 21:12:33,299 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 25 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 68 ImplicationChecksByTransitivity, 240.2ms TimeCoverageRelationStatistics Valid=91, Invalid=289, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:12:33,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-05 21:12:33,302 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 68. [2021-10-05 21:12:33,303 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:33,303 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2021-10-05 21:12:33,304 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 14 [2021-10-05 21:12:33,304 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:33,304 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2021-10-05 21:12:33,304 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:33,304 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2021-10-05 21:12:33,305 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:33,305 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:33,305 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:33,336 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (7)] Ended with exit code 0 [2021-10-05 21:12:33,519 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 7 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable12 [2021-10-05 21:12:33,520 INFO L402 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:33,521 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:33,521 INFO L82 PathProgramCache]: Analyzing trace with hash 591395430, now seen corresponding path program 7 times [2021-10-05 21:12:33,521 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:33,522 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1104817540] [2021-10-05 21:12:33,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:33,522 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:33,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:33,633 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:33,633 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:33,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1104817540] [2021-10-05 21:12:33,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1104817540] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:33,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [604092107] [2021-10-05 21:12:33,634 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:12:33,634 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:33,634 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:33,635 INFO L229 MonitoredProcess]: Starting monitored process 8 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:33,650 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Waiting until timeout for monitored process [2021-10-05 21:12:33,791 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:33,793 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:33,794 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:34,050 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:34,050 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [604092107] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:34,050 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:34,051 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:34,051 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [530584836] [2021-10-05 21:12:34,051 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:34,051 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:34,052 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:34,052 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:34,053 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:34,208 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:34,209 INFO L93 Difference]: Finished difference Result 79 states and 163 transitions. [2021-10-05 21:12:34,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:12:34,210 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:34,210 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:34,211 INFO L225 Difference]: With dead ends: 79 [2021-10-05 21:12:34,211 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 21:12:34,212 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 48 ImplicationChecksByTransitivity, 170.7ms TimeCoverageRelationStatistics Valid=77, Invalid=229, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:12:34,213 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 21:12:34,220 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-10-05 21:12:34,220 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:34,221 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-05 21:12:34,221 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-05 21:12:34,222 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:34,222 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-05 21:12:34,222 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:34,222 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-05 21:12:34,223 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 15 [2021-10-05 21:12:34,223 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:34,224 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:34,262 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (8)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:34,439 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 8 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable13 [2021-10-05 21:12:34,440 INFO L402 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:34,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:34,441 INFO L82 PathProgramCache]: Analyzing trace with hash -2144342638, now seen corresponding path program 8 times [2021-10-05 21:12:34,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:34,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1352124006] [2021-10-05 21:12:34,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:34,442 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:34,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:34,555 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:34,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:34,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1352124006] [2021-10-05 21:12:34,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1352124006] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:34,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [960398186] [2021-10-05 21:12:34,557 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:12:34,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:34,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:34,558 INFO L229 MonitoredProcess]: Starting monitored process 9 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:34,577 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Waiting until timeout for monitored process [2021-10-05 21:12:34,723 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:34,723 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:34,724 INFO L263 TraceCheckSpWp]: Trace formula consists of 92 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:34,725 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:34,972 INFO L134 CoverageAnalysis]: Checked inductivity of 1 backedges. 0 proven. 1 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:34,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [960398186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:34,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:34,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [6, 6] total 12 [2021-10-05 21:12:34,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2091831472] [2021-10-05 21:12:34,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:34,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:34,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:34,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=45, Invalid=137, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:34,975 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,104 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:35,105 INFO L93 Difference]: Finished difference Result 75 states and 155 transitions. [2021-10-05 21:12:35,105 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2021-10-05 21:12:35,105 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 14 [2021-10-05 21:12:35,105 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:35,107 INFO L225 Difference]: With dead ends: 75 [2021-10-05 21:12:35,107 INFO L226 Difference]: Without dead ends: 70 [2021-10-05 21:12:35,111 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 16 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 46 ImplicationChecksByTransitivity, 181.9ms TimeCoverageRelationStatistics Valid=79, Invalid=227, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:12:35,111 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 70 states. [2021-10-05 21:12:35,115 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 70 to 66. [2021-10-05 21:12:35,116 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.2) internal successors, (143), 65 states have internal predecessors, (143), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,116 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 143 transitions. [2021-10-05 21:12:35,117 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 143 transitions. Word has length 14 [2021-10-05 21:12:35,117 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:35,117 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 143 transitions. [2021-10-05 21:12:35,117 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.1538461538461537) internal successors, (28), 13 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,118 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 143 transitions. [2021-10-05 21:12:35,118 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:35,118 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:35,118 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:35,143 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (9)] Ended with exit code 0 [2021-10-05 21:12:35,331 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 9 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable14 [2021-10-05 21:12:35,332 INFO L402 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:35,333 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:35,333 INFO L82 PathProgramCache]: Analyzing trace with hash -1586224341, now seen corresponding path program 1 times [2021-10-05 21:12:35,333 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:35,334 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1061552477] [2021-10-05 21:12:35,334 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:35,334 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:35,358 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:35,435 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:35,435 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:35,435 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1061552477] [2021-10-05 21:12:35,436 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1061552477] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:35,436 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1403946560] [2021-10-05 21:12:35,436 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:35,436 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:35,437 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:35,438 INFO L229 MonitoredProcess]: Starting monitored process 10 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:35,472 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Waiting until timeout for monitored process [2021-10-05 21:12:35,617 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:35,618 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:35,619 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:35,842 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:35,842 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1403946560] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:35,842 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:35,842 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:35,844 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1403773078] [2021-10-05 21:12:35,845 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:35,845 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:35,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:35,848 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:35,848 INFO L87 Difference]: Start difference. First operand 66 states and 143 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,950 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:35,950 INFO L93 Difference]: Finished difference Result 87 states and 171 transitions. [2021-10-05 21:12:35,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:35,951 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:35,951 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:35,952 INFO L225 Difference]: With dead ends: 87 [2021-10-05 21:12:35,952 INFO L226 Difference]: Without dead ends: 68 [2021-10-05 21:12:35,952 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 15 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 39 ImplicationChecksByTransitivity, 136.0ms TimeCoverageRelationStatistics Valid=60, Invalid=212, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:12:35,953 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 68 states. [2021-10-05 21:12:35,955 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 68 to 60. [2021-10-05 21:12:35,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 60 states, 59 states have (on average 2.2033898305084745) internal successors, (130), 59 states have internal predecessors, (130), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 60 states to 60 states and 130 transitions. [2021-10-05 21:12:35,956 INFO L78 Accepts]: Start accepts. Automaton has 60 states and 130 transitions. Word has length 15 [2021-10-05 21:12:35,956 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:35,956 INFO L470 AbstractCegarLoop]: Abstraction has 60 states and 130 transitions. [2021-10-05 21:12:35,956 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:35,956 INFO L276 IsEmpty]: Start isEmpty. Operand 60 states and 130 transitions. [2021-10-05 21:12:35,957 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:35,957 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:35,957 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:35,986 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (10)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:36,157 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15,10 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:36,158 INFO L402 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:36,159 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:36,159 INFO L82 PathProgramCache]: Analyzing trace with hash 101721543, now seen corresponding path program 9 times [2021-10-05 21:12:36,159 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:36,159 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [797349866] [2021-10-05 21:12:36,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:36,160 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:36,177 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:36,332 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:36,333 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:36,333 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [797349866] [2021-10-05 21:12:36,333 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [797349866] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:36,334 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [482798433] [2021-10-05 21:12:36,334 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:12:36,334 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:36,334 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:36,337 INFO L229 MonitoredProcess]: Starting monitored process 11 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:36,362 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Waiting until timeout for monitored process [2021-10-05 21:12:36,515 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:12:36,515 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:36,517 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:36,518 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:36,758 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:36,759 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [482798433] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:36,759 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:36,759 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:36,759 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1990854758] [2021-10-05 21:12:36,760 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:36,760 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:36,760 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:36,761 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:36,761 INFO L87 Difference]: Start difference. First operand 60 states and 130 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:37,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:37,060 INFO L93 Difference]: Finished difference Result 124 states and 252 transitions. [2021-10-05 21:12:37,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:12:37,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:37,061 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:37,062 INFO L225 Difference]: With dead ends: 124 [2021-10-05 21:12:37,062 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 21:12:37,063 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 352.8ms TimeCoverageRelationStatistics Valid=138, Invalid=414, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:12:37,063 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 21:12:37,066 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 64. [2021-10-05 21:12:37,067 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1746031746031744) internal successors, (137), 63 states have internal predecessors, (137), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:37,067 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 137 transitions. [2021-10-05 21:12:37,067 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 137 transitions. Word has length 15 [2021-10-05 21:12:37,068 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:37,068 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 137 transitions. [2021-10-05 21:12:37,068 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:37,068 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 137 transitions. [2021-10-05 21:12:37,069 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:37,069 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:37,069 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:37,105 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (11)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:37,280 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 11 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable16 [2021-10-05 21:12:37,281 INFO L402 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:37,281 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:37,282 INFO L82 PathProgramCache]: Analyzing trace with hash -1737769185, now seen corresponding path program 10 times [2021-10-05 21:12:37,282 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:37,282 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081408436] [2021-10-05 21:12:37,283 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:37,283 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:37,307 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:37,449 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:37,450 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:37,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081408436] [2021-10-05 21:12:37,450 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081408436] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:37,450 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1599831237] [2021-10-05 21:12:37,451 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:12:37,451 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:37,451 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:37,452 INFO L229 MonitoredProcess]: Starting monitored process 12 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:37,453 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Waiting until timeout for monitored process [2021-10-05 21:12:37,658 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:12:37,658 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:37,660 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:37,661 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:37,898 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:37,899 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1599831237] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:37,899 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:37,899 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:37,899 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [472517294] [2021-10-05 21:12:37,900 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:37,900 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:37,900 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:37,900 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:37,901 INFO L87 Difference]: Start difference. First operand 64 states and 137 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:38,415 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:38,415 INFO L93 Difference]: Finished difference Result 164 states and 331 transitions. [2021-10-05 21:12:38,415 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:12:38,416 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:38,416 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:38,417 INFO L225 Difference]: With dead ends: 164 [2021-10-05 21:12:38,417 INFO L226 Difference]: Without dead ends: 154 [2021-10-05 21:12:38,418 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 133 ImplicationChecksByTransitivity, 476.7ms TimeCoverageRelationStatistics Valid=156, Invalid=494, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:12:38,418 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 154 states. [2021-10-05 21:12:38,421 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 154 to 66. [2021-10-05 21:12:38,421 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.246153846153846) internal successors, (146), 65 states have internal predecessors, (146), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:38,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 146 transitions. [2021-10-05 21:12:38,422 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 146 transitions. Word has length 15 [2021-10-05 21:12:38,422 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:38,423 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 146 transitions. [2021-10-05 21:12:38,423 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:38,423 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 146 transitions. [2021-10-05 21:12:38,424 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:38,424 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:38,424 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:38,459 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (12)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:38,634 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 12 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable17 [2021-10-05 21:12:38,635 INFO L402 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:38,635 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:38,636 INFO L82 PathProgramCache]: Analyzing trace with hash 839449051, now seen corresponding path program 11 times [2021-10-05 21:12:38,636 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:38,637 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003182652] [2021-10-05 21:12:38,637 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:38,637 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:38,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:38,806 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:38,806 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003182652] [2021-10-05 21:12:38,807 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003182652] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:38,807 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1581902531] [2021-10-05 21:12:38,807 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:12:38,807 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:38,807 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:38,808 INFO L229 MonitoredProcess]: Starting monitored process 13 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:38,828 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Waiting until timeout for monitored process [2021-10-05 21:12:39,025 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:39,025 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:39,027 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:39,028 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:39,280 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:39,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1581902531] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:39,280 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:39,281 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:39,281 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1032579085] [2021-10-05 21:12:39,281 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:39,281 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:39,282 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:39,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=136, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:39,282 INFO L87 Difference]: Start difference. First operand 66 states and 146 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:39,760 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:39,760 INFO L93 Difference]: Finished difference Result 144 states and 299 transitions. [2021-10-05 21:12:39,761 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:12:39,761 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:39,761 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:39,763 INFO L225 Difference]: With dead ends: 144 [2021-10-05 21:12:39,763 INFO L226 Difference]: Without dead ends: 134 [2021-10-05 21:12:39,764 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 34 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 155 ImplicationChecksByTransitivity, 472.8ms TimeCoverageRelationStatistics Valid=171, Invalid=531, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:12:39,764 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 134 states. [2021-10-05 21:12:39,767 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 134 to 72. [2021-10-05 21:12:39,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3661971830985915) internal successors, (168), 71 states have internal predecessors, (168), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:39,768 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 168 transitions. [2021-10-05 21:12:39,768 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 168 transitions. Word has length 15 [2021-10-05 21:12:39,769 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:39,769 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 168 transitions. [2021-10-05 21:12:39,769 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:39,769 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 168 transitions. [2021-10-05 21:12:39,770 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:39,770 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:39,770 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:39,807 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (13)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:39,984 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18,13 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:39,985 INFO L402 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:39,985 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:39,985 INFO L82 PathProgramCache]: Analyzing trace with hash 1519105235, now seen corresponding path program 2 times [2021-10-05 21:12:39,986 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:39,986 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [100330151] [2021-10-05 21:12:39,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:39,987 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:40,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:40,086 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:40,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:40,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [100330151] [2021-10-05 21:12:40,086 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [100330151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:40,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1632543958] [2021-10-05 21:12:40,087 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:12:40,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:40,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:40,088 INFO L229 MonitoredProcess]: Starting monitored process 14 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:40,097 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Waiting until timeout for monitored process [2021-10-05 21:12:40,327 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:40,327 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:40,328 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:40,329 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:40,534 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:40,535 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1632543958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:40,535 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:40,535 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:40,535 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2092764780] [2021-10-05 21:12:40,535 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:40,536 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:40,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:40,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=144, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:40,536 INFO L87 Difference]: Start difference. First operand 72 states and 168 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:40,672 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:40,672 INFO L93 Difference]: Finished difference Result 101 states and 214 transitions. [2021-10-05 21:12:40,673 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:40,673 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:40,673 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:40,674 INFO L225 Difference]: With dead ends: 101 [2021-10-05 21:12:40,674 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 21:12:40,675 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 34 ImplicationChecksByTransitivity, 128.2ms TimeCoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:40,675 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 21:12:40,677 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-05 21:12:40,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.3972602739726026) internal successors, (175), 73 states have internal predecessors, (175), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:40,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 175 transitions. [2021-10-05 21:12:40,678 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 175 transitions. Word has length 15 [2021-10-05 21:12:40,679 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:40,679 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 175 transitions. [2021-10-05 21:12:40,679 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:40,679 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 175 transitions. [2021-10-05 21:12:40,679 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:40,680 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:40,680 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:40,716 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (14)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:40,894 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 14 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable19 [2021-10-05 21:12:40,895 INFO L402 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:40,895 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:40,896 INFO L82 PathProgramCache]: Analyzing trace with hash -439992313, now seen corresponding path program 12 times [2021-10-05 21:12:40,896 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:40,896 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2094105858] [2021-10-05 21:12:40,896 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:40,897 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:40,913 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:41,048 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:41,049 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:41,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2094105858] [2021-10-05 21:12:41,049 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2094105858] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:41,049 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1114184100] [2021-10-05 21:12:41,049 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:12:41,049 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:41,050 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:41,050 INFO L229 MonitoredProcess]: Starting monitored process 15 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:41,071 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Waiting until timeout for monitored process [2021-10-05 21:12:41,305 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:12:41,306 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:41,307 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:41,310 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:41,549 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:41,550 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1114184100] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:41,550 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:41,550 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:41,551 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [176051817] [2021-10-05 21:12:41,553 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:41,553 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:41,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:41,554 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=37, Invalid=145, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:41,555 INFO L87 Difference]: Start difference. First operand 74 states and 175 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:42,060 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:42,061 INFO L93 Difference]: Finished difference Result 168 states and 346 transitions. [2021-10-05 21:12:42,061 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:12:42,061 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:42,062 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:42,063 INFO L225 Difference]: With dead ends: 168 [2021-10-05 21:12:42,063 INFO L226 Difference]: Without dead ends: 158 [2021-10-05 21:12:42,064 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 121 ImplicationChecksByTransitivity, 428.2ms TimeCoverageRelationStatistics Valid=132, Invalid=468, Unknown=0, NotChecked=0, Total=600 [2021-10-05 21:12:42,065 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-05 21:12:42,072 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 80. [2021-10-05 21:12:42,073 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.5063291139240507) internal successors, (198), 79 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:42,073 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 198 transitions. [2021-10-05 21:12:42,073 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 198 transitions. Word has length 15 [2021-10-05 21:12:42,074 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:42,076 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 198 transitions. [2021-10-05 21:12:42,076 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:42,077 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 198 transitions. [2021-10-05 21:12:42,077 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:42,077 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:42,077 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:42,104 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (15)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:42,291 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20,15 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:42,292 INFO L402 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:42,292 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:42,293 INFO L82 PathProgramCache]: Analyzing trace with hash 2137225923, now seen corresponding path program 13 times [2021-10-05 21:12:42,293 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:42,293 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [502340674] [2021-10-05 21:12:42,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:42,294 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:42,313 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:42,474 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:42,474 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:42,474 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [502340674] [2021-10-05 21:12:42,474 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [502340674] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:42,475 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [8219995] [2021-10-05 21:12:42,475 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:12:42,475 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:42,475 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:42,479 INFO L229 MonitoredProcess]: Starting monitored process 16 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:42,499 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Waiting until timeout for monitored process [2021-10-05 21:12:42,734 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:42,735 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:42,736 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:42,993 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:42,994 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [8219995] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:42,994 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:42,994 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:42,994 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1628692994] [2021-10-05 21:12:42,995 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:42,995 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:42,996 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:42,996 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:42,996 INFO L87 Difference]: Start difference. First operand 80 states and 198 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:43,499 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:43,500 INFO L93 Difference]: Finished difference Result 174 states and 351 transitions. [2021-10-05 21:12:43,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:12:43,503 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:43,503 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:43,505 INFO L225 Difference]: With dead ends: 174 [2021-10-05 21:12:43,505 INFO L226 Difference]: Without dead ends: 164 [2021-10-05 21:12:43,505 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 480.4ms TimeCoverageRelationStatistics Valid=146, Invalid=504, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:12:43,506 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-05 21:12:43,509 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 78. [2021-10-05 21:12:43,509 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 78 states, 77 states have (on average 2.4545454545454546) internal successors, (189), 77 states have internal predecessors, (189), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:43,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 78 states to 78 states and 189 transitions. [2021-10-05 21:12:43,510 INFO L78 Accepts]: Start accepts. Automaton has 78 states and 189 transitions. Word has length 15 [2021-10-05 21:12:43,510 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:43,510 INFO L470 AbstractCegarLoop]: Abstraction has 78 states and 189 transitions. [2021-10-05 21:12:43,511 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:43,511 INFO L276 IsEmpty]: Start isEmpty. Operand 78 states and 189 transitions. [2021-10-05 21:12:43,511 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:43,511 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:43,511 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:43,547 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (16)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:43,724 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21,16 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:43,725 INFO L402 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:43,725 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:43,726 INFO L82 PathProgramCache]: Analyzing trace with hash 1426935105, now seen corresponding path program 3 times [2021-10-05 21:12:43,726 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:43,726 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [964613343] [2021-10-05 21:12:43,727 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:43,727 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:43,740 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:43,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:43,830 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:43,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [964613343] [2021-10-05 21:12:43,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [964613343] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:43,830 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1186275448] [2021-10-05 21:12:43,830 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:12:43,831 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:43,831 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:43,832 INFO L229 MonitoredProcess]: Starting monitored process 17 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:43,833 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Waiting until timeout for monitored process [2021-10-05 21:12:44,139 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:12:44,140 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:44,140 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:44,141 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:44,378 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:44,379 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1186275448] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:44,379 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:44,379 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:44,379 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [648291818] [2021-10-05 21:12:44,381 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:44,381 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:44,382 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:44,382 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=139, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:44,382 INFO L87 Difference]: Start difference. First operand 78 states and 189 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:44,482 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:44,482 INFO L93 Difference]: Finished difference Result 111 states and 236 transitions. [2021-10-05 21:12:44,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:44,482 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:44,483 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:44,484 INFO L225 Difference]: With dead ends: 111 [2021-10-05 21:12:44,484 INFO L226 Difference]: Without dead ends: 102 [2021-10-05 21:12:44,484 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 14 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 31 ImplicationChecksByTransitivity, 150.3ms TimeCoverageRelationStatistics Valid=60, Invalid=180, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:44,484 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 102 states. [2021-10-05 21:12:44,487 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 102 to 80. [2021-10-05 21:12:44,487 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4556962025316458) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:44,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 194 transitions. [2021-10-05 21:12:44,488 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 194 transitions. Word has length 15 [2021-10-05 21:12:44,488 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:44,488 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 194 transitions. [2021-10-05 21:12:44,488 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:44,489 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 194 transitions. [2021-10-05 21:12:44,489 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:44,489 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:44,489 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:44,519 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (17)] Ended with exit code 0 [2021-10-05 21:12:44,699 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 17 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable22 [2021-10-05 21:12:44,700 INFO L402 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:44,700 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:44,701 INFO L82 PathProgramCache]: Analyzing trace with hash -290813955, now seen corresponding path program 4 times [2021-10-05 21:12:44,701 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:44,701 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [696135618] [2021-10-05 21:12:44,701 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:44,702 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:44,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:44,807 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:44,807 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:44,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [696135618] [2021-10-05 21:12:44,808 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [696135618] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:44,808 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1825721852] [2021-10-05 21:12:44,808 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:12:44,808 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:44,809 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:44,810 INFO L229 MonitoredProcess]: Starting monitored process 18 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:44,832 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Waiting until timeout for monitored process [2021-10-05 21:12:45,109 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:12:45,110 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:45,111 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 21:12:45,112 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:45,390 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:45,391 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1825721852] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:45,391 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:45,391 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 21:12:45,391 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589784095] [2021-10-05 21:12:45,392 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:12:45,392 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:45,393 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:12:45,393 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=53, Invalid=187, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:45,393 INFO L87 Difference]: Start difference. First operand 80 states and 194 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:45,574 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:45,574 INFO L93 Difference]: Finished difference Result 101 states and 222 transitions. [2021-10-05 21:12:45,574 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2021-10-05 21:12:45,575 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:45,575 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:45,576 INFO L225 Difference]: With dead ends: 101 [2021-10-05 21:12:45,576 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 21:12:45,576 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 26 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 79 ImplicationChecksByTransitivity, 216.0ms TimeCoverageRelationStatistics Valid=94, Invalid=326, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:12:45,577 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 21:12:45,579 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-05 21:12:45,579 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.4556962025316458) internal successors, (194), 79 states have internal predecessors, (194), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:45,580 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 194 transitions. [2021-10-05 21:12:45,580 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 194 transitions. Word has length 15 [2021-10-05 21:12:45,580 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:45,580 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 194 transitions. [2021-10-05 21:12:45,580 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:45,580 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 194 transitions. [2021-10-05 21:12:45,581 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:45,581 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:45,581 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:45,617 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (18)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:45,796 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23,18 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:45,797 INFO L402 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:45,797 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:45,798 INFO L82 PathProgramCache]: Analyzing trace with hash 1355655373, now seen corresponding path program 14 times [2021-10-05 21:12:45,798 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:45,798 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [882174304] [2021-10-05 21:12:45,799 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:45,799 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:45,815 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:45,937 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:45,937 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:45,937 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [882174304] [2021-10-05 21:12:45,938 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [882174304] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:45,938 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [7210380] [2021-10-05 21:12:45,938 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:12:45,938 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:45,938 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:45,939 INFO L229 MonitoredProcess]: Starting monitored process 19 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:45,940 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Waiting until timeout for monitored process [2021-10-05 21:12:46,251 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:46,251 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:46,253 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:46,254 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:46,517 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:46,518 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [7210380] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:46,518 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:46,518 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 12 [2021-10-05 21:12:46,518 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275002377] [2021-10-05 21:12:46,519 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 14 states [2021-10-05 21:12:46,519 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:46,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 14 interpolants. [2021-10-05 21:12:46,520 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=143, Unknown=0, NotChecked=0, Total=182 [2021-10-05 21:12:46,520 INFO L87 Difference]: Start difference. First operand 80 states and 194 transitions. Second operand has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:46,904 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:46,904 INFO L93 Difference]: Finished difference Result 148 states and 304 transitions. [2021-10-05 21:12:46,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:12:46,906 INFO L78 Accepts]: Start accepts. Automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:46,906 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:46,907 INFO L225 Difference]: With dead ends: 148 [2021-10-05 21:12:46,907 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:12:46,908 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 128 ImplicationChecksByTransitivity, 390.6ms TimeCoverageRelationStatistics Valid=135, Invalid=465, Unknown=0, NotChecked=0, Total=600 [2021-10-05 21:12:46,908 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:12:46,911 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 74. [2021-10-05 21:12:46,911 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2465753424657535) internal successors, (164), 73 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:46,912 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 164 transitions. [2021-10-05 21:12:46,912 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 164 transitions. Word has length 15 [2021-10-05 21:12:46,912 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:46,912 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 164 transitions. [2021-10-05 21:12:46,912 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 14 states, 13 states have (on average 2.0) internal successors, (26), 13 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:46,912 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 164 transitions. [2021-10-05 21:12:46,913 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:46,913 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:46,913 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:46,937 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (19)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:47,113 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24,19 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:47,114 INFO L402 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:47,115 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:47,115 INFO L82 PathProgramCache]: Analyzing trace with hash -1199484693, now seen corresponding path program 5 times [2021-10-05 21:12:47,115 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:47,116 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914498408] [2021-10-05 21:12:47,116 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:47,116 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:47,129 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:47,207 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:47,207 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:47,207 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914498408] [2021-10-05 21:12:47,208 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914498408] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:47,208 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [727270061] [2021-10-05 21:12:47,208 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:12:47,208 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:47,208 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:47,209 INFO L229 MonitoredProcess]: Starting monitored process 20 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:47,224 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Waiting until timeout for monitored process [2021-10-05 21:12:47,510 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:47,511 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:47,512 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 21:12:47,513 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:47,769 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:47,770 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [727270061] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:47,770 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:47,770 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 21:12:47,770 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684010759] [2021-10-05 21:12:47,771 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:12:47,771 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:47,772 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:12:47,772 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=191, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:47,772 INFO L87 Difference]: Start difference. First operand 74 states and 164 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:47,915 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:47,916 INFO L93 Difference]: Finished difference Result 101 states and 206 transitions. [2021-10-05 21:12:47,916 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:47,916 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:47,917 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:47,917 INFO L225 Difference]: With dead ends: 101 [2021-10-05 21:12:47,917 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 21:12:47,919 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 70 ImplicationChecksByTransitivity, 178.4ms TimeCoverageRelationStatistics Valid=68, Invalid=274, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:12:47,920 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 21:12:47,922 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 74. [2021-10-05 21:12:47,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.219178082191781) internal successors, (162), 73 states have internal predecessors, (162), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:47,924 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 162 transitions. [2021-10-05 21:12:47,924 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 162 transitions. Word has length 15 [2021-10-05 21:12:47,924 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:47,925 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 162 transitions. [2021-10-05 21:12:47,925 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:47,925 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 162 transitions. [2021-10-05 21:12:47,926 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:47,926 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:47,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:47,964 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (20)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:48,141 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 20 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable25 [2021-10-05 21:12:48,142 INFO L402 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:48,142 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:48,143 INFO L82 PathProgramCache]: Analyzing trace with hash -1291654823, now seen corresponding path program 6 times [2021-10-05 21:12:48,143 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:48,143 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [376664277] [2021-10-05 21:12:48,143 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:48,144 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:48,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:48,249 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:48,249 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:48,249 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [376664277] [2021-10-05 21:12:48,249 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [376664277] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:48,250 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [229388869] [2021-10-05 21:12:48,250 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:12:48,250 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:48,250 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:48,251 INFO L229 MonitoredProcess]: Starting monitored process 21 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:48,254 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Waiting until timeout for monitored process [2021-10-05 21:12:48,610 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:12:48,610 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:48,612 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:48,613 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:48,803 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:48,804 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [229388869] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:48,804 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:48,804 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:12:48,804 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [901946118] [2021-10-05 21:12:48,805 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:12:48,805 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:48,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:12:48,807 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:12:48,807 INFO L87 Difference]: Start difference. First operand 74 states and 162 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:48,899 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:48,899 INFO L93 Difference]: Finished difference Result 93 states and 190 transitions. [2021-10-05 21:12:48,900 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:48,900 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:48,900 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:48,901 INFO L225 Difference]: With dead ends: 93 [2021-10-05 21:12:48,901 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 21:12:48,902 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 127.6ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:48,902 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 21:12:48,903 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 76. [2021-10-05 21:12:48,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 76 states, 75 states have (on average 2.2266666666666666) internal successors, (167), 75 states have internal predecessors, (167), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:48,904 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 76 states to 76 states and 167 transitions. [2021-10-05 21:12:48,904 INFO L78 Accepts]: Start accepts. Automaton has 76 states and 167 transitions. Word has length 15 [2021-10-05 21:12:48,904 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:48,904 INFO L470 AbstractCegarLoop]: Abstraction has 76 states and 167 transitions. [2021-10-05 21:12:48,905 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:48,905 INFO L276 IsEmpty]: Start isEmpty. Operand 76 states and 167 transitions. [2021-10-05 21:12:48,905 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:48,905 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:48,905 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:48,938 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (21)] Ended with exit code 0 [2021-10-05 21:12:49,118 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 21 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable26 [2021-10-05 21:12:49,119 INFO L402 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:49,119 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:49,120 INFO L82 PathProgramCache]: Analyzing trace with hash 1285563413, now seen corresponding path program 7 times [2021-10-05 21:12:49,120 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:49,120 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049156687] [2021-10-05 21:12:49,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:49,121 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:49,136 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:49,236 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:49,236 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:49,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049156687] [2021-10-05 21:12:49,237 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049156687] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:49,237 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [26346979] [2021-10-05 21:12:49,237 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:12:49,237 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:49,238 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:49,239 INFO L229 MonitoredProcess]: Starting monitored process 22 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:49,260 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Waiting until timeout for monitored process [2021-10-05 21:12:49,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:49,598 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:49,599 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:49,797 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:49,798 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [26346979] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:49,798 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:49,798 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:12:49,798 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1148794242] [2021-10-05 21:12:49,798 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:12:49,799 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:49,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:12:49,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:12:49,800 INFO L87 Difference]: Start difference. First operand 76 states and 167 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:49,920 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:49,920 INFO L93 Difference]: Finished difference Result 83 states and 176 transitions. [2021-10-05 21:12:49,920 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:49,921 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:49,921 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:49,922 INFO L225 Difference]: With dead ends: 83 [2021-10-05 21:12:49,922 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 21:12:49,923 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 144.0ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:49,923 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 21:12:49,925 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 72. [2021-10-05 21:12:49,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.211267605633803) internal successors, (157), 71 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:49,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 157 transitions. [2021-10-05 21:12:49,926 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 157 transitions. Word has length 15 [2021-10-05 21:12:49,926 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:49,926 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 157 transitions. [2021-10-05 21:12:49,927 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:49,927 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 157 transitions. [2021-10-05 21:12:49,927 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:49,927 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:49,927 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:49,956 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (22)] Ended with exit code 0 [2021-10-05 21:12:50,142 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 22 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable27 [2021-10-05 21:12:50,143 INFO L402 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:50,143 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:50,144 INFO L82 PathProgramCache]: Analyzing trace with hash -926513517, now seen corresponding path program 8 times [2021-10-05 21:12:50,144 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:50,144 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1678146672] [2021-10-05 21:12:50,145 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:50,145 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:50,157 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:50,243 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:50,243 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:50,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1678146672] [2021-10-05 21:12:50,244 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1678146672] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:50,244 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1113258789] [2021-10-05 21:12:50,244 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:12:50,244 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:50,245 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:50,246 INFO L229 MonitoredProcess]: Starting monitored process 23 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:50,247 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Waiting until timeout for monitored process [2021-10-05 21:12:50,622 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:50,622 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:50,623 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:50,624 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:50,829 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:50,830 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1113258789] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:50,830 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:50,830 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:12:50,831 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2047496562] [2021-10-05 21:12:50,831 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:12:50,831 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:50,832 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:12:50,832 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=34, Invalid=122, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:12:50,832 INFO L87 Difference]: Start difference. First operand 72 states and 157 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:50,951 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:50,952 INFO L93 Difference]: Finished difference Result 91 states and 181 transitions. [2021-10-05 21:12:50,952 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:50,952 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:50,952 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:50,953 INFO L225 Difference]: With dead ends: 91 [2021-10-05 21:12:50,953 INFO L226 Difference]: Without dead ends: 78 [2021-10-05 21:12:50,953 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 30 ImplicationChecksByTransitivity, 132.4ms TimeCoverageRelationStatistics Valid=47, Invalid=163, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:50,954 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 78 states. [2021-10-05 21:12:50,956 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 78 to 68. [2021-10-05 21:12:50,956 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.208955223880597) internal successors, (148), 67 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:50,956 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 148 transitions. [2021-10-05 21:12:50,957 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 148 transitions. Word has length 15 [2021-10-05 21:12:50,957 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:50,957 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 148 transitions. [2021-10-05 21:12:50,957 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:50,957 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 148 transitions. [2021-10-05 21:12:50,958 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:50,958 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:50,958 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:50,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (23)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:51,171 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 23 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable28 [2021-10-05 21:12:51,172 INFO L402 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:51,172 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:51,173 INFO L82 PathProgramCache]: Analyzing trace with hash 1409356231, now seen corresponding path program 15 times [2021-10-05 21:12:51,173 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:51,173 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837516026] [2021-10-05 21:12:51,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:51,174 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:51,188 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:51,359 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:51,359 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:51,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837516026] [2021-10-05 21:12:51,360 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837516026] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:51,360 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1913996779] [2021-10-05 21:12:51,360 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:12:51,360 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:51,360 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:51,362 INFO L229 MonitoredProcess]: Starting monitored process 24 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:51,384 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Waiting until timeout for monitored process [2021-10-05 21:12:51,748 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:12:51,748 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:51,749 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:51,750 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:52,064 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:52,064 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1913996779] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:52,065 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:52,065 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 21:12:52,065 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [68808741] [2021-10-05 21:12:52,066 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:12:52,066 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:52,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:12:52,067 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=166, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:52,067 INFO L87 Difference]: Start difference. First operand 68 states and 148 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:52,448 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:52,448 INFO L93 Difference]: Finished difference Result 116 states and 229 transitions. [2021-10-05 21:12:52,449 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2021-10-05 21:12:52,449 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:52,449 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:52,450 INFO L225 Difference]: With dead ends: 116 [2021-10-05 21:12:52,450 INFO L226 Difference]: Without dead ends: 106 [2021-10-05 21:12:52,450 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 111 ImplicationChecksByTransitivity, 416.2ms TimeCoverageRelationStatistics Valid=99, Invalid=363, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:12:52,451 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-05 21:12:52,453 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 70. [2021-10-05 21:12:52,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2753623188405796) internal successors, (157), 69 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:52,454 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 157 transitions. [2021-10-05 21:12:52,454 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 157 transitions. Word has length 15 [2021-10-05 21:12:52,454 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:52,455 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 157 transitions. [2021-10-05 21:12:52,455 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:52,455 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 157 transitions. [2021-10-05 21:12:52,456 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:52,456 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:52,456 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:52,487 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (24)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:52,669 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29,24 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:52,670 INFO L402 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:52,670 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:52,671 INFO L82 PathProgramCache]: Analyzing trace with hash -308392829, now seen corresponding path program 16 times [2021-10-05 21:12:52,671 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:52,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [289259123] [2021-10-05 21:12:52,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:52,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:52,699 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:52,834 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:52,834 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [289259123] [2021-10-05 21:12:52,835 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [289259123] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:52,835 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [30586421] [2021-10-05 21:12:52,835 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:12:52,835 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:52,835 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:52,840 INFO L229 MonitoredProcess]: Starting monitored process 25 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:52,850 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Waiting until timeout for monitored process [2021-10-05 21:12:53,249 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:12:53,249 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:53,250 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:53,251 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:53,516 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:53,517 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [30586421] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:53,517 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:53,517 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 21:12:53,517 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [744812621] [2021-10-05 21:12:53,518 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:12:53,518 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:53,519 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:12:53,519 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=164, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:53,519 INFO L87 Difference]: Start difference. First operand 70 states and 157 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:53,931 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:53,931 INFO L93 Difference]: Finished difference Result 124 states and 237 transitions. [2021-10-05 21:12:53,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:12:53,932 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:53,932 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:53,933 INFO L225 Difference]: With dead ends: 124 [2021-10-05 21:12:53,933 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 21:12:53,933 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 132 ImplicationChecksByTransitivity, 404.5ms TimeCoverageRelationStatistics Valid=122, Invalid=430, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:12:53,934 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 21:12:53,948 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 72. [2021-10-05 21:12:53,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 72 states, 71 states have (on average 2.3380281690140845) internal successors, (166), 71 states have internal predecessors, (166), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:53,950 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 72 states to 72 states and 166 transitions. [2021-10-05 21:12:53,950 INFO L78 Accepts]: Start accepts. Automaton has 72 states and 166 transitions. Word has length 15 [2021-10-05 21:12:53,950 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:53,950 INFO L470 AbstractCegarLoop]: Abstraction has 72 states and 166 transitions. [2021-10-05 21:12:53,950 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:53,951 INFO L276 IsEmpty]: Start isEmpty. Operand 72 states and 166 transitions. [2021-10-05 21:12:53,951 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:53,951 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:53,951 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:53,990 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (25)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:54,165 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 25 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable30 [2021-10-05 21:12:54,166 INFO L402 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:54,167 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:54,167 INFO L82 PathProgramCache]: Analyzing trace with hash -1018683647, now seen corresponding path program 9 times [2021-10-05 21:12:54,167 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:54,167 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536762054] [2021-10-05 21:12:54,168 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:54,168 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:54,190 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:54,279 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:54,279 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:54,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536762054] [2021-10-05 21:12:54,280 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536762054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:54,280 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1069889730] [2021-10-05 21:12:54,280 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:12:54,280 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:54,281 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:54,282 INFO L229 MonitoredProcess]: Starting monitored process 26 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:54,302 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Waiting until timeout for monitored process [2021-10-05 21:12:54,682 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:12:54,682 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:54,683 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 21 conjunts are in the unsatisfiable core [2021-10-05 21:12:54,684 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:54,899 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:54,900 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1069889730] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:54,900 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:54,900 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:12:54,900 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [141611018] [2021-10-05 21:12:54,901 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:12:54,901 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:54,901 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:12:54,902 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=39, Invalid=117, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:12:54,902 INFO L87 Difference]: Start difference. First operand 72 states and 166 transitions. Second operand has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:55,017 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:55,018 INFO L93 Difference]: Finished difference Result 89 states and 186 transitions. [2021-10-05 21:12:55,018 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:55,019 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:55,019 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:55,019 INFO L225 Difference]: With dead ends: 89 [2021-10-05 21:12:55,020 INFO L226 Difference]: Without dead ends: 80 [2021-10-05 21:12:55,020 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 23 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 13 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 24 ImplicationChecksByTransitivity, 133.7ms TimeCoverageRelationStatistics Valid=56, Invalid=154, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:55,020 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 80 states. [2021-10-05 21:12:55,022 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 80 to 68. [2021-10-05 21:12:55,023 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 68 states, 67 states have (on average 2.343283582089552) internal successors, (157), 67 states have internal predecessors, (157), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:55,023 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 68 states to 68 states and 157 transitions. [2021-10-05 21:12:55,024 INFO L78 Accepts]: Start accepts. Automaton has 68 states and 157 transitions. Word has length 15 [2021-10-05 21:12:55,024 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:55,024 INFO L470 AbstractCegarLoop]: Abstraction has 68 states and 157 transitions. [2021-10-05 21:12:55,024 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0) internal successors, (24), 12 states have internal predecessors, (24), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:55,024 INFO L276 IsEmpty]: Start isEmpty. Operand 68 states and 157 transitions. [2021-10-05 21:12:55,025 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:55,025 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:55,025 INFO L512 BasicCegarLoop]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:55,063 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (26)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:55,239 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31,26 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:55,240 INFO L402 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:55,240 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:55,241 INFO L82 PathProgramCache]: Analyzing trace with hash 1558534589, now seen corresponding path program 10 times [2021-10-05 21:12:55,241 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:55,241 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714295281] [2021-10-05 21:12:55,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:55,242 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:55,269 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:55,382 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:55,382 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:55,382 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714295281] [2021-10-05 21:12:55,383 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714295281] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:55,384 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [130772212] [2021-10-05 21:12:55,384 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:12:55,384 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:55,385 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:55,386 INFO L229 MonitoredProcess]: Starting monitored process 27 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:55,386 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Waiting until timeout for monitored process [2021-10-05 21:12:55,822 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:12:55,822 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:55,823 INFO L263 TraceCheckSpWp]: Trace formula consists of 102 conjuncts, 24 conjunts are in the unsatisfiable core [2021-10-05 21:12:55,824 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:56,097 INFO L134 CoverageAnalysis]: Checked inductivity of 2 backedges. 0 proven. 2 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:56,098 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [130772212] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:56,098 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:56,098 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 14 [2021-10-05 21:12:56,098 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [542791361] [2021-10-05 21:12:56,099 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:12:56,099 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:56,099 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:12:56,100 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=184, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:56,100 INFO L87 Difference]: Start difference. First operand 68 states and 157 transitions. Second operand has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:56,223 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:56,223 INFO L93 Difference]: Finished difference Result 79 states and 172 transitions. [2021-10-05 21:12:56,223 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2021-10-05 21:12:56,223 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:56,224 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:56,224 INFO L225 Difference]: With dead ends: 79 [2021-10-05 21:12:56,225 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 21:12:56,225 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 24 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 17 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 72 ImplicationChecksByTransitivity, 204.3ms TimeCoverageRelationStatistics Valid=79, Invalid=263, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:12:56,226 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 21:12:56,228 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 66. [2021-10-05 21:12:56,228 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 66 states, 65 states have (on average 2.3384615384615386) internal successors, (152), 65 states have internal predecessors, (152), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:56,228 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 66 states to 66 states and 152 transitions. [2021-10-05 21:12:56,229 INFO L78 Accepts]: Start accepts. Automaton has 66 states and 152 transitions. Word has length 15 [2021-10-05 21:12:56,229 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:56,229 INFO L470 AbstractCegarLoop]: Abstraction has 66 states and 152 transitions. [2021-10-05 21:12:56,229 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 2.0) internal successors, (30), 15 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:56,230 INFO L276 IsEmpty]: Start isEmpty. Operand 66 states and 152 transitions. [2021-10-05 21:12:56,230 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:56,230 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:56,230 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:56,256 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (27)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:56,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32,27 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:56,441 INFO L402 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:56,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:56,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1089963379, now seen corresponding path program 17 times [2021-10-05 21:12:56,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:56,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1496169802] [2021-10-05 21:12:56,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:56,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:56,466 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:56,606 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:56,606 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:56,606 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1496169802] [2021-10-05 21:12:56,607 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1496169802] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:56,607 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1817506516] [2021-10-05 21:12:56,607 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:12:56,607 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:56,607 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:56,608 INFO L229 MonitoredProcess]: Starting monitored process 28 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:56,616 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Waiting until timeout for monitored process [2021-10-05 21:12:57,034 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:57,034 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:57,035 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:57,036 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:57,316 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:57,317 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1817506516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:57,317 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:57,317 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 13 [2021-10-05 21:12:57,318 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1059732356] [2021-10-05 21:12:57,318 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:12:57,318 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:57,319 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:12:57,319 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:12:57,319 INFO L87 Difference]: Start difference. First operand 66 states and 152 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:57,683 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:57,683 INFO L93 Difference]: Finished difference Result 110 states and 216 transitions. [2021-10-05 21:12:57,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:12:57,684 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:57,684 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:57,685 INFO L225 Difference]: With dead ends: 110 [2021-10-05 21:12:57,685 INFO L226 Difference]: Without dead ends: 84 [2021-10-05 21:12:57,686 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 8 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 123 ImplicationChecksByTransitivity, 373.7ms TimeCoverageRelationStatistics Valid=115, Invalid=437, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:12:57,687 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 84 states. [2021-10-05 21:12:57,688 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 84 to 58. [2021-10-05 21:12:57,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 58 states, 57 states have (on average 2.1403508771929824) internal successors, (122), 57 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:57,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 58 states to 58 states and 122 transitions. [2021-10-05 21:12:57,689 INFO L78 Accepts]: Start accepts. Automaton has 58 states and 122 transitions. Word has length 15 [2021-10-05 21:12:57,689 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:57,689 INFO L470 AbstractCegarLoop]: Abstraction has 58 states and 122 transitions. [2021-10-05 21:12:57,690 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:57,690 INFO L276 IsEmpty]: Start isEmpty. Operand 58 states and 122 transitions. [2021-10-05 21:12:57,690 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 16 [2021-10-05 21:12:57,690 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:57,690 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:57,714 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (28)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:57,891 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 28 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable33 [2021-10-05 21:12:57,892 INFO L402 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:57,893 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:57,893 INFO L82 PathProgramCache]: Analyzing trace with hash 1542619159, now seen corresponding path program 18 times [2021-10-05 21:12:57,898 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:57,898 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2109956532] [2021-10-05 21:12:57,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:57,898 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:57,917 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:58,038 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:58,039 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2109956532] [2021-10-05 21:12:58,039 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2109956532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:58,039 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1426908537] [2021-10-05 21:12:58,040 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:12:58,040 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:58,040 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:58,041 INFO L229 MonitoredProcess]: Starting monitored process 29 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:58,043 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Waiting until timeout for monitored process [2021-10-05 21:12:58,524 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:12:58,524 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:58,525 INFO L263 TraceCheckSpWp]: Trace formula consists of 97 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:58,527 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:58,744 INFO L134 CoverageAnalysis]: Checked inductivity of 3 backedges. 0 proven. 3 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:58,744 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1426908537] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:58,745 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:58,745 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [7, 7] total 11 [2021-10-05 21:12:58,745 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635933282] [2021-10-05 21:12:58,746 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 13 states [2021-10-05 21:12:58,746 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:58,746 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 13 interpolants. [2021-10-05 21:12:58,747 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=36, Invalid=120, Unknown=0, NotChecked=0, Total=156 [2021-10-05 21:12:58,747 INFO L87 Difference]: Start difference. First operand 58 states and 122 transitions. Second operand has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:58,964 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:12:58,964 INFO L93 Difference]: Finished difference Result 74 states and 143 transitions. [2021-10-05 21:12:58,964 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2021-10-05 21:12:58,964 INFO L78 Accepts]: Start accepts. Automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 15 [2021-10-05 21:12:58,965 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:12:58,965 INFO L225 Difference]: With dead ends: 74 [2021-10-05 21:12:58,965 INFO L226 Difference]: Without dead ends: 54 [2021-10-05 21:12:58,965 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 28 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 18 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 87 ImplicationChecksByTransitivity, 247.8ms TimeCoverageRelationStatistics Valid=86, Invalid=294, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:12:58,966 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 54 states. [2021-10-05 21:12:58,967 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 54 to 54. [2021-10-05 21:12:58,967 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 54 states, 53 states have (on average 2.150943396226415) internal successors, (114), 53 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:58,968 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 54 states to 54 states and 114 transitions. [2021-10-05 21:12:58,968 INFO L78 Accepts]: Start accepts. Automaton has 54 states and 114 transitions. Word has length 15 [2021-10-05 21:12:58,968 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:12:58,968 INFO L470 AbstractCegarLoop]: Abstraction has 54 states and 114 transitions. [2021-10-05 21:12:58,969 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 13 states, 12 states have (on average 2.0833333333333335) internal successors, (25), 12 states have internal predecessors, (25), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:12:58,969 INFO L276 IsEmpty]: Start isEmpty. Operand 54 states and 114 transitions. [2021-10-05 21:12:58,969 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:12:58,969 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:12:58,969 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:12:58,994 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (29)] Forceful destruction successful, exit code 0 [2021-10-05 21:12:59,170 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 29 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable34 [2021-10-05 21:12:59,170 INFO L402 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:12:59,171 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:12:59,171 INFO L82 PathProgramCache]: Analyzing trace with hash 903968588, now seen corresponding path program 11 times [2021-10-05 21:12:59,171 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:12:59,172 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1183461298] [2021-10-05 21:12:59,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:12:59,173 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:12:59,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:12:59,283 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:59,283 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:12:59,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1183461298] [2021-10-05 21:12:59,284 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1183461298] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:59,284 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1488993516] [2021-10-05 21:12:59,284 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:12:59,285 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:12:59,285 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:12:59,287 INFO L229 MonitoredProcess]: Starting monitored process 30 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:12:59,307 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Waiting until timeout for monitored process [2021-10-05 21:12:59,759 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:12:59,759 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:12:59,760 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:12:59,761 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:12:59,985 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:12:59,986 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1488993516] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:12:59,986 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:12:59,987 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:12:59,987 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1767611969] [2021-10-05 21:12:59,988 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:12:59,988 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:12:59,988 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:12:59,989 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:12:59,989 INFO L87 Difference]: Start difference. First operand 54 states and 114 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:00,239 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:00,240 INFO L93 Difference]: Finished difference Result 106 states and 206 transitions. [2021-10-05 21:13:00,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:00,240 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:00,241 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:00,242 INFO L225 Difference]: With dead ends: 106 [2021-10-05 21:13:00,242 INFO L226 Difference]: Without dead ends: 96 [2021-10-05 21:13:00,243 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 31 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 22 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 115 ImplicationChecksByTransitivity, 261.0ms TimeCoverageRelationStatistics Valid=102, Invalid=450, Unknown=0, NotChecked=0, Total=552 [2021-10-05 21:13:00,243 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 96 states. [2021-10-05 21:13:00,245 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 96 to 80. [2021-10-05 21:13:00,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.0759493670886076) internal successors, (164), 79 states have internal predecessors, (164), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:00,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 164 transitions. [2021-10-05 21:13:00,246 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 164 transitions. Word has length 16 [2021-10-05 21:13:00,247 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:00,247 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 164 transitions. [2021-10-05 21:13:00,247 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:00,247 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 164 transitions. [2021-10-05 21:13:00,248 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:00,248 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:00,248 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:00,275 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (30)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:00,454 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35,30 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:00,455 INFO L402 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:00,455 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:00,455 INFO L82 PathProgramCache]: Analyzing trace with hash -285669132, now seen corresponding path program 12 times [2021-10-05 21:13:00,456 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:00,456 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718085778] [2021-10-05 21:13:00,456 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:00,457 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:00,471 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:00,568 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:00,569 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:00,569 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718085778] [2021-10-05 21:13:00,569 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718085778] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:00,570 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [263077275] [2021-10-05 21:13:00,570 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:00,570 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:00,570 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:00,576 INFO L229 MonitoredProcess]: Starting monitored process 31 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:00,591 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Waiting until timeout for monitored process [2021-10-05 21:13:01,032 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:13:01,032 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:01,034 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:01,035 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:01,271 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:01,271 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [263077275] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:01,272 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:01,272 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:13:01,272 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1280494824] [2021-10-05 21:13:01,273 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:13:01,273 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:01,274 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:13:01,274 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=198, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:13:01,275 INFO L87 Difference]: Start difference. First operand 80 states and 164 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:01,548 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:01,549 INFO L93 Difference]: Finished difference Result 132 states and 260 transitions. [2021-10-05 21:13:01,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:13:01,549 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:01,550 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:01,550 INFO L225 Difference]: With dead ends: 132 [2021-10-05 21:13:01,551 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:13:01,551 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 126 ImplicationChecksByTransitivity, 288.3ms TimeCoverageRelationStatistics Valid=111, Invalid=489, Unknown=0, NotChecked=0, Total=600 [2021-10-05 21:13:01,551 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:13:01,553 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-05 21:13:01,554 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.152941176470588) internal successors, (183), 85 states have internal predecessors, (183), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:01,554 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 183 transitions. [2021-10-05 21:13:01,555 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 183 transitions. Word has length 16 [2021-10-05 21:13:01,555 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:01,555 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 183 transitions. [2021-10-05 21:13:01,555 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:01,556 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 183 transitions. [2021-10-05 21:13:01,556 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:01,556 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:01,556 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:01,593 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (31)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:01,770 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 31 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable36 [2021-10-05 21:13:01,771 INFO L402 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:01,771 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:01,772 INFO L82 PathProgramCache]: Analyzing trace with hash -377839262, now seen corresponding path program 13 times [2021-10-05 21:13:01,772 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:01,772 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1722947205] [2021-10-05 21:13:01,773 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:01,774 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:01,788 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:01,902 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:01,903 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:01,903 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1722947205] [2021-10-05 21:13:01,904 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1722947205] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:01,904 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [298356920] [2021-10-05 21:13:01,904 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:01,904 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:01,905 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:01,906 INFO L229 MonitoredProcess]: Starting monitored process 32 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:01,927 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Waiting until timeout for monitored process [2021-10-05 21:13:02,371 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:02,372 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:02,373 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:02,617 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:02,617 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [298356920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:02,617 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:02,617 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:13:02,618 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2050719252] [2021-10-05 21:13:02,618 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:13:02,618 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:02,619 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:13:02,619 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:13:02,619 INFO L87 Difference]: Start difference. First operand 86 states and 183 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:02,889 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:02,890 INFO L93 Difference]: Finished difference Result 152 states and 304 transitions. [2021-10-05 21:13:02,890 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:13:02,890 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:02,891 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:02,891 INFO L225 Difference]: With dead ends: 152 [2021-10-05 21:13:02,892 INFO L226 Difference]: Without dead ends: 142 [2021-10-05 21:13:02,892 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 32 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 23 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 139 ImplicationChecksByTransitivity, 281.3ms TimeCoverageRelationStatistics Valid=106, Invalid=494, Unknown=0, NotChecked=0, Total=600 [2021-10-05 21:13:02,893 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 142 states. [2021-10-05 21:13:02,895 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 142 to 92. [2021-10-05 21:13:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-05 21:13:02,897 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-05 21:13:02,897 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:02,897 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-05 21:13:02,897 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:02,897 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-05 21:13:02,898 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:02,898 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:02,898 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:02,938 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (32)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:03,107 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 32 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable37 [2021-10-05 21:13:03,108 INFO L402 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:03,108 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:03,109 INFO L82 PathProgramCache]: Analyzing trace with hash -2095588322, now seen corresponding path program 14 times [2021-10-05 21:13:03,109 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:03,109 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2051738030] [2021-10-05 21:13:03,109 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:03,110 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:03,123 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:03,233 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:03,233 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:03,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2051738030] [2021-10-05 21:13:03,234 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2051738030] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:03,234 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2102726186] [2021-10-05 21:13:03,234 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:03,234 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:03,234 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:03,235 INFO L229 MonitoredProcess]: Starting monitored process 33 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:03,236 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Waiting until timeout for monitored process [2021-10-05 21:13:03,751 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:03,751 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:03,753 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:03,753 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:04,002 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:04,002 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2102726186] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:04,002 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:04,002 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:13:04,003 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [255335208] [2021-10-05 21:13:04,003 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:13:04,003 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:04,004 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:13:04,004 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=46, Invalid=194, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:13:04,004 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:04,307 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:04,307 INFO L93 Difference]: Finished difference Result 128 states and 265 transitions. [2021-10-05 21:13:04,307 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:04,307 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:04,308 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:04,309 INFO L225 Difference]: With dead ends: 128 [2021-10-05 21:13:04,310 INFO L226 Difference]: Without dead ends: 118 [2021-10-05 21:13:04,310 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 24 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 152 ImplicationChecksByTransitivity, 302.2ms TimeCoverageRelationStatistics Valid=112, Invalid=538, Unknown=0, NotChecked=0, Total=650 [2021-10-05 21:13:04,311 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 118 states. [2021-10-05 21:13:04,314 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 118 to 92. [2021-10-05 21:13:04,314 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 92 states, 91 states have (on average 2.2857142857142856) internal successors, (208), 91 states have internal predecessors, (208), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:04,315 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 92 states to 92 states and 208 transitions. [2021-10-05 21:13:04,315 INFO L78 Accepts]: Start accepts. Automaton has 92 states and 208 transitions. Word has length 16 [2021-10-05 21:13:04,315 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:04,316 INFO L470 AbstractCegarLoop]: Abstraction has 92 states and 208 transitions. [2021-10-05 21:13:04,316 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:04,316 INFO L276 IsEmpty]: Start isEmpty. Operand 92 states and 208 transitions. [2021-10-05 21:13:04,317 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:04,317 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:04,317 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:04,345 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (33)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:04,528 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 33 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable38 [2021-10-05 21:13:04,529 INFO L402 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:04,529 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:04,530 INFO L82 PathProgramCache]: Analyzing trace with hash 1371785798, now seen corresponding path program 15 times [2021-10-05 21:13:04,530 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:04,530 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568370594] [2021-10-05 21:13:04,531 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:04,531 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:04,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:04,656 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:04,656 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:04,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568370594] [2021-10-05 21:13:04,657 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568370594] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:04,657 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [73465367] [2021-10-05 21:13:04,658 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:04,658 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:04,658 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:04,659 INFO L229 MonitoredProcess]: Starting monitored process 34 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:04,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Waiting until timeout for monitored process [2021-10-05 21:13:05,211 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:13:05,211 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:05,213 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:05,214 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:05,443 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:05,444 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [73465367] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:05,444 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:05,444 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:13:05,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [112854189] [2021-10-05 21:13:05,445 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:13:05,445 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:05,446 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:13:05,446 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=193, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:13:05,446 INFO L87 Difference]: Start difference. First operand 92 states and 208 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:05,709 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:05,709 INFO L93 Difference]: Finished difference Result 178 states and 370 transitions. [2021-10-05 21:13:05,710 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:13:05,710 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:05,710 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:05,711 INFO L225 Difference]: With dead ends: 178 [2021-10-05 21:13:05,711 INFO L226 Difference]: Without dead ends: 168 [2021-10-05 21:13:05,712 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 268.8ms TimeCoverageRelationStatistics Valid=101, Invalid=405, Unknown=0, NotChecked=0, Total=506 [2021-10-05 21:13:05,712 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 168 states. [2021-10-05 21:13:05,715 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 168 to 106. [2021-10-05 21:13:05,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4285714285714284) internal successors, (255), 105 states have internal predecessors, (255), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:05,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 255 transitions. [2021-10-05 21:13:05,717 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 255 transitions. Word has length 16 [2021-10-05 21:13:05,717 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:05,717 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 255 transitions. [2021-10-05 21:13:05,717 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:05,717 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 255 transitions. [2021-10-05 21:13:05,718 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:05,718 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:05,718 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:05,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (34)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:05,930 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 34 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable39 [2021-10-05 21:13:05,931 INFO L402 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:05,931 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:05,932 INFO L82 PathProgramCache]: Analyzing trace with hash -345963262, now seen corresponding path program 16 times [2021-10-05 21:13:05,932 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:05,932 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1796617451] [2021-10-05 21:13:05,933 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:05,934 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:05,964 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:06,075 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:06,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:06,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1796617451] [2021-10-05 21:13:06,076 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1796617451] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:06,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [2041064490] [2021-10-05 21:13:06,076 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:13:06,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:06,077 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:06,078 INFO L229 MonitoredProcess]: Starting monitored process 35 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:06,099 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Waiting until timeout for monitored process [2021-10-05 21:13:06,613 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:13:06,614 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:06,615 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 28 conjunts are in the unsatisfiable core [2021-10-05 21:13:06,616 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:06,909 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:06,909 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [2041064490] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:06,909 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:06,910 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 16 [2021-10-05 21:13:06,910 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1411612034] [2021-10-05 21:13:06,910 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:06,910 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:06,911 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:06,911 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=252, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:06,911 INFO L87 Difference]: Start difference. First operand 106 states and 255 transitions. Second operand has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:07,276 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:07,276 INFO L93 Difference]: Finished difference Result 182 states and 372 transitions. [2021-10-05 21:13:07,276 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:07,277 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:07,277 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:07,278 INFO L225 Difference]: With dead ends: 182 [2021-10-05 21:13:07,278 INFO L226 Difference]: Without dead ends: 172 [2021-10-05 21:13:07,279 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 33 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 179 ImplicationChecksByTransitivity, 371.2ms TimeCoverageRelationStatistics Valid=127, Invalid=629, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:13:07,279 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 172 states. [2021-10-05 21:13:07,282 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 172 to 102. [2021-10-05 21:13:07,283 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3465346534653464) internal successors, (237), 101 states have internal predecessors, (237), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:07,283 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 237 transitions. [2021-10-05 21:13:07,283 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 237 transitions. Word has length 16 [2021-10-05 21:13:07,284 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:07,284 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 237 transitions. [2021-10-05 21:13:07,284 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.8823529411764706) internal successors, (32), 17 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:07,284 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 237 transitions. [2021-10-05 21:13:07,285 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:07,285 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:07,285 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:07,319 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (35)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:07,500 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40,35 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:07,501 INFO L402 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:07,501 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:07,502 INFO L82 PathProgramCache]: Analyzing trace with hash -1127533812, now seen corresponding path program 17 times [2021-10-05 21:13:07,502 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:07,502 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1826136151] [2021-10-05 21:13:07,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:07,503 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:07,516 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:07,610 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:07,610 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:07,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1826136151] [2021-10-05 21:13:07,611 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1826136151] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:07,611 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [21862295] [2021-10-05 21:13:07,611 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:13:07,611 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:07,612 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:07,613 INFO L229 MonitoredProcess]: Starting monitored process 36 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:07,617 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Waiting until timeout for monitored process [2021-10-05 21:13:08,180 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:13:08,181 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:08,182 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:08,182 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:08,430 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:08,430 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [21862295] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:08,431 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:08,431 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 14 [2021-10-05 21:13:08,431 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999955833] [2021-10-05 21:13:08,431 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 16 states [2021-10-05 21:13:08,432 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:08,432 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 16 interpolants. [2021-10-05 21:13:08,432 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=44, Invalid=196, Unknown=0, NotChecked=0, Total=240 [2021-10-05 21:13:08,432 INFO L87 Difference]: Start difference. First operand 102 states and 237 transitions. Second operand has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:08,691 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:08,691 INFO L93 Difference]: Finished difference Result 140 states and 296 transitions. [2021-10-05 21:13:08,692 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 17 states. [2021-10-05 21:13:08,692 INFO L78 Accepts]: Start accepts. Automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:08,692 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:08,693 INFO L225 Difference]: With dead ends: 140 [2021-10-05 21:13:08,694 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:13:08,694 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 21 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 108 ImplicationChecksByTransitivity, 262.6ms TimeCoverageRelationStatistics Valid=96, Invalid=410, Unknown=0, NotChecked=0, Total=506 [2021-10-05 21:13:08,695 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:13:08,698 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 102. [2021-10-05 21:13:08,698 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.2475247524752477) internal successors, (227), 101 states have internal predecessors, (227), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:08,699 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 227 transitions. [2021-10-05 21:13:08,699 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 227 transitions. Word has length 16 [2021-10-05 21:13:08,699 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:08,699 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 227 transitions. [2021-10-05 21:13:08,700 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 16 states, 15 states have (on average 1.8666666666666667) internal successors, (28), 15 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:08,700 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 227 transitions. [2021-10-05 21:13:08,700 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:08,700 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:08,701 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:08,731 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (36)] Ended with exit code 0 [2021-10-05 21:13:08,914 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 36 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable41 [2021-10-05 21:13:08,915 INFO L402 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:08,915 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:08,916 INFO L82 PathProgramCache]: Analyzing trace with hash -1381200908, now seen corresponding path program 18 times [2021-10-05 21:13:08,916 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:08,916 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [343182286] [2021-10-05 21:13:08,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:08,917 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:08,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:09,026 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:09,027 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [343182286] [2021-10-05 21:13:09,027 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [343182286] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:09,027 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [494926307] [2021-10-05 21:13:09,028 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:09,028 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:09,028 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:09,032 INFO L229 MonitoredProcess]: Starting monitored process 37 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:09,041 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Waiting until timeout for monitored process [2021-10-05 21:13:09,612 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:13:09,613 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:09,614 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:09,615 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:09,833 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:09,834 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [494926307] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:09,834 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:09,834 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:09,834 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1613749134] [2021-10-05 21:13:09,835 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:09,835 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:09,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:09,836 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:09,836 INFO L87 Difference]: Start difference. First operand 102 states and 227 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:10,050 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:10,050 INFO L93 Difference]: Finished difference Result 142 states and 293 transitions. [2021-10-05 21:13:10,052 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:13:10,052 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:10,052 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:10,053 INFO L225 Difference]: With dead ends: 142 [2021-10-05 21:13:10,053 INFO L226 Difference]: Without dead ends: 132 [2021-10-05 21:13:10,054 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 216.7ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:10,054 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-05 21:13:10,056 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 104. [2021-10-05 21:13:10,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 104 states, 103 states have (on average 2.2718446601941746) internal successors, (234), 103 states have internal predecessors, (234), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:10,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 104 states to 104 states and 234 transitions. [2021-10-05 21:13:10,058 INFO L78 Accepts]: Start accepts. Automaton has 104 states and 234 transitions. Word has length 16 [2021-10-05 21:13:10,058 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:10,058 INFO L470 AbstractCegarLoop]: Abstraction has 104 states and 234 transitions. [2021-10-05 21:13:10,058 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:10,058 INFO L276 IsEmpty]: Start isEmpty. Operand 104 states and 234 transitions. [2021-10-05 21:13:10,059 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:10,059 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:10,059 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:10,091 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (37)] Ended with exit code 0 [2021-10-05 21:13:10,273 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42,37 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:10,274 INFO L402 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:10,274 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:10,274 INFO L82 PathProgramCache]: Analyzing trace with hash -1473371038, now seen corresponding path program 19 times [2021-10-05 21:13:10,275 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:10,275 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [792861391] [2021-10-05 21:13:10,275 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:10,276 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:10,288 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:10,404 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:10,404 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:10,404 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [792861391] [2021-10-05 21:13:10,405 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [792861391] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:10,405 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1662392143] [2021-10-05 21:13:10,405 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:10,405 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:10,405 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:10,406 INFO L229 MonitoredProcess]: Starting monitored process 38 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:10,428 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Waiting until timeout for monitored process [2021-10-05 21:13:10,986 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:10,987 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:10,988 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:11,208 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:11,209 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1662392143] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:11,209 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:11,209 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:11,209 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1246286265] [2021-10-05 21:13:11,210 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:11,210 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:11,211 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:11,211 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:11,211 INFO L87 Difference]: Start difference. First operand 104 states and 234 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:11,451 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:11,451 INFO L93 Difference]: Finished difference Result 174 states and 348 transitions. [2021-10-05 21:13:11,452 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:11,452 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:11,452 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:11,453 INFO L225 Difference]: With dead ends: 174 [2021-10-05 21:13:11,453 INFO L226 Difference]: Without dead ends: 164 [2021-10-05 21:13:11,454 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 209.7ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:11,454 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 164 states. [2021-10-05 21:13:11,456 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 164 to 106. [2021-10-05 21:13:11,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3142857142857145) internal successors, (243), 105 states have internal predecessors, (243), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:11,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 243 transitions. [2021-10-05 21:13:11,457 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 243 transitions. Word has length 16 [2021-10-05 21:13:11,457 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:11,457 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 243 transitions. [2021-10-05 21:13:11,458 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:11,458 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 243 transitions. [2021-10-05 21:13:11,458 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:11,458 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:11,459 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:11,484 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (38)] Ended with exit code 0 [2021-10-05 21:13:11,663 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 38 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable43 [2021-10-05 21:13:11,664 INFO L402 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:11,664 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:11,665 INFO L82 PathProgramCache]: Analyzing trace with hash 1103847198, now seen corresponding path program 20 times [2021-10-05 21:13:11,665 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:11,665 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1146580132] [2021-10-05 21:13:11,665 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:11,666 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:11,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:11,784 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:11,784 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:11,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1146580132] [2021-10-05 21:13:11,785 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1146580132] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:11,785 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [779668620] [2021-10-05 21:13:11,785 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:11,785 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:11,786 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:11,787 INFO L229 MonitoredProcess]: Starting monitored process 39 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:11,788 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Waiting until timeout for monitored process [2021-10-05 21:13:12,401 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:12,401 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:12,403 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:12,404 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:12,638 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:12,638 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [779668620] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:12,638 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:12,639 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:12,639 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [836994877] [2021-10-05 21:13:12,639 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:12,639 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:12,640 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:12,640 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:12,640 INFO L87 Difference]: Start difference. First operand 106 states and 243 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:12,871 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:12,871 INFO L93 Difference]: Finished difference Result 150 states and 309 transitions. [2021-10-05 21:13:12,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:12,872 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:12,872 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:12,873 INFO L225 Difference]: With dead ends: 150 [2021-10-05 21:13:12,873 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 21:13:12,874 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 214.1ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:12,874 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 21:13:12,877 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 94. [2021-10-05 21:13:12,877 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 94 states, 93 states have (on average 2.182795698924731) internal successors, (203), 93 states have internal predecessors, (203), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:12,878 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 94 states to 94 states and 203 transitions. [2021-10-05 21:13:12,878 INFO L78 Accepts]: Start accepts. Automaton has 94 states and 203 transitions. Word has length 16 [2021-10-05 21:13:12,878 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:12,878 INFO L470 AbstractCegarLoop]: Abstraction has 94 states and 203 transitions. [2021-10-05 21:13:12,878 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:12,879 INFO L276 IsEmpty]: Start isEmpty. Operand 94 states and 203 transitions. [2021-10-05 21:13:12,879 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:12,879 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:12,879 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:12,919 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (39)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:13,089 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44,39 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:13,090 INFO L402 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:13,090 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:13,090 INFO L82 PathProgramCache]: Analyzing trace with hash -1509029044, now seen corresponding path program 21 times [2021-10-05 21:13:13,091 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:13,091 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [901175599] [2021-10-05 21:13:13,091 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:13,091 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:13,106 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:13,200 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:13,200 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:13,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [901175599] [2021-10-05 21:13:13,201 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [901175599] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:13,201 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1546961169] [2021-10-05 21:13:13,201 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:13,202 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:13,202 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:13,203 INFO L229 MonitoredProcess]: Starting monitored process 40 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:13,223 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Waiting until timeout for monitored process [2021-10-05 21:13:13,829 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:13:13,829 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:13,830 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:13,831 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:14,057 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:14,058 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1546961169] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:14,058 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:14,058 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:14,058 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [912574482] [2021-10-05 21:13:14,059 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:14,059 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:14,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:14,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=38, Invalid=172, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:14,060 INFO L87 Difference]: Start difference. First operand 94 states and 203 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:14,281 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:14,282 INFO L93 Difference]: Finished difference Result 134 states and 273 transitions. [2021-10-05 21:13:14,282 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2021-10-05 21:13:14,282 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:14,282 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:14,283 INFO L225 Difference]: With dead ends: 134 [2021-10-05 21:13:14,283 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 21:13:14,284 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 88 ImplicationChecksByTransitivity, 227.0ms TimeCoverageRelationStatistics Valid=76, Invalid=344, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:14,284 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 21:13:14,286 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 98. [2021-10-05 21:13:14,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 98 states, 97 states have (on average 2.2371134020618557) internal successors, (217), 97 states have internal predecessors, (217), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:14,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 98 states to 98 states and 217 transitions. [2021-10-05 21:13:14,288 INFO L78 Accepts]: Start accepts. Automaton has 98 states and 217 transitions. Word has length 16 [2021-10-05 21:13:14,288 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:14,288 INFO L470 AbstractCegarLoop]: Abstraction has 98 states and 217 transitions. [2021-10-05 21:13:14,288 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:14,288 INFO L276 IsEmpty]: Start isEmpty. Operand 98 states and 217 transitions. [2021-10-05 21:13:14,289 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:14,289 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:14,289 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:14,330 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (40)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:14,502 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45,40 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:14,503 INFO L402 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:14,504 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:14,504 INFO L82 PathProgramCache]: Analyzing trace with hash -1601199174, now seen corresponding path program 22 times [2021-10-05 21:13:14,504 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:14,505 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [956532534] [2021-10-05 21:13:14,505 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:14,505 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:14,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:14,630 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:14,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [956532534] [2021-10-05 21:13:14,630 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [956532534] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:14,630 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [812786577] [2021-10-05 21:13:14,630 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:13:14,631 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:14,631 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:14,632 INFO L229 MonitoredProcess]: Starting monitored process 41 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:14,654 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Waiting until timeout for monitored process [2021-10-05 21:13:15,230 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:13:15,231 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:15,232 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:15,232 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:15,459 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:15,459 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [812786577] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:15,460 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:15,460 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:15,460 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1975843881] [2021-10-05 21:13:15,461 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:15,461 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:15,461 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:15,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:15,462 INFO L87 Difference]: Start difference. First operand 98 states and 217 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:15,699 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:15,699 INFO L93 Difference]: Finished difference Result 170 states and 344 transitions. [2021-10-05 21:13:15,699 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:15,700 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:15,700 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:15,701 INFO L225 Difference]: With dead ends: 170 [2021-10-05 21:13:15,701 INFO L226 Difference]: Without dead ends: 160 [2021-10-05 21:13:15,701 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 91 ImplicationChecksByTransitivity, 220.8ms TimeCoverageRelationStatistics Valid=77, Invalid=343, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:15,704 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 160 states. [2021-10-05 21:13:15,707 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 160 to 102. [2021-10-05 21:13:15,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:15,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 21:13:15,709 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 21:13:15,709 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:15,709 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 21:13:15,709 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:15,710 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 21:13:15,710 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:15,710 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:15,711 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:15,750 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (41)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:15,911 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 41 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable46 [2021-10-05 21:13:15,912 INFO L402 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:15,912 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:15,912 INFO L82 PathProgramCache]: Analyzing trace with hash 976019062, now seen corresponding path program 23 times [2021-10-05 21:13:15,913 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:15,913 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [528585001] [2021-10-05 21:13:15,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:15,914 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:15,930 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:16,086 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:16,086 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:16,086 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [528585001] [2021-10-05 21:13:16,087 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [528585001] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:16,087 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1980845446] [2021-10-05 21:13:16,087 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:13:16,087 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:16,087 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:16,088 INFO L229 MonitoredProcess]: Starting monitored process 42 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:16,104 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Waiting until timeout for monitored process [2021-10-05 21:13:16,719 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:13:16,719 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:16,720 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:16,721 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:16,944 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:16,945 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1980845446] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:16,945 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:16,945 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:16,945 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1406539966] [2021-10-05 21:13:16,946 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:16,946 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:16,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:16,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=42, Invalid=168, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:16,947 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:17,219 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:17,219 INFO L93 Difference]: Finished difference Result 146 states and 305 transitions. [2021-10-05 21:13:17,220 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:13:17,220 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:17,220 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:17,221 INFO L225 Difference]: With dead ends: 146 [2021-10-05 21:13:17,221 INFO L226 Difference]: Without dead ends: 136 [2021-10-05 21:13:17,222 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 30 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 20 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 100 ImplicationChecksByTransitivity, 260.6ms TimeCoverageRelationStatistics Valid=83, Invalid=379, Unknown=0, NotChecked=0, Total=462 [2021-10-05 21:13:17,222 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 136 states. [2021-10-05 21:13:17,224 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 136 to 102. [2021-10-05 21:13:17,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:17,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 21:13:17,225 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 21:13:17,225 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:17,225 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 21:13:17,225 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:17,226 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 21:13:17,226 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:17,226 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:17,227 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:17,260 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (42)] Ended with exit code 0 [2021-10-05 21:13:17,440 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 42 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable47 [2021-10-05 21:13:17,441 INFO L402 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:17,441 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:17,442 INFO L82 PathProgramCache]: Analyzing trace with hash -1427951482, now seen corresponding path program 24 times [2021-10-05 21:13:17,442 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:17,442 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1192858957] [2021-10-05 21:13:17,442 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:17,443 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:17,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:17,560 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:17,561 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:17,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1192858957] [2021-10-05 21:13:17,561 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1192858957] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:17,561 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1082615600] [2021-10-05 21:13:17,562 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:17,562 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:17,562 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:17,563 INFO L229 MonitoredProcess]: Starting monitored process 43 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:17,589 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Waiting until timeout for monitored process [2021-10-05 21:13:18,204 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:13:18,204 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:18,206 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:18,207 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:18,442 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:18,443 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1082615600] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:18,443 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:18,443 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:18,444 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1000325672] [2021-10-05 21:13:18,444 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:18,444 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:18,445 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:18,445 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:18,446 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:18,724 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:18,724 INFO L93 Difference]: Finished difference Result 172 states and 358 transitions. [2021-10-05 21:13:18,725 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:18,725 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:18,726 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:18,727 INFO L225 Difference]: With dead ends: 172 [2021-10-05 21:13:18,727 INFO L226 Difference]: Without dead ends: 162 [2021-10-05 21:13:18,727 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 266.5ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:18,728 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-05 21:13:18,732 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 106. [2021-10-05 21:13:18,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.4095238095238094) internal successors, (253), 105 states have internal predecessors, (253), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:18,733 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 253 transitions. [2021-10-05 21:13:18,733 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 253 transitions. Word has length 16 [2021-10-05 21:13:18,733 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:18,734 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 253 transitions. [2021-10-05 21:13:18,734 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:18,734 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 253 transitions. [2021-10-05 21:13:18,735 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:18,735 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:18,735 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:18,774 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (43)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:18,949 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 43 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable48 [2021-10-05 21:13:18,950 INFO L402 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:18,950 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:18,951 INFO L82 PathProgramCache]: Analyzing trace with hash 1149266754, now seen corresponding path program 25 times [2021-10-05 21:13:18,951 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:18,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1488999355] [2021-10-05 21:13:18,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:18,952 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:18,970 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:19,074 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:19,075 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:19,075 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1488999355] [2021-10-05 21:13:19,075 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1488999355] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:19,076 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1799120678] [2021-10-05 21:13:19,076 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:19,076 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:19,076 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:19,077 INFO L229 MonitoredProcess]: Starting monitored process 44 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:19,102 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Waiting until timeout for monitored process [2021-10-05 21:13:19,722 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:19,723 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:19,724 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:19,941 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:19,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1799120678] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:19,942 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:19,942 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:19,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [182845640] [2021-10-05 21:13:19,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:19,943 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:19,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:19,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=43, Invalid=167, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:19,944 INFO L87 Difference]: Start difference. First operand 106 states and 253 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:20,212 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:20,212 INFO L93 Difference]: Finished difference Result 176 states and 360 transitions. [2021-10-05 21:13:20,212 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:20,213 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:20,213 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:20,214 INFO L225 Difference]: With dead ends: 176 [2021-10-05 21:13:20,215 INFO L226 Difference]: Without dead ends: 166 [2021-10-05 21:13:20,215 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 81 ImplicationChecksByTransitivity, 251.1ms TimeCoverageRelationStatistics Valid=91, Invalid=329, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:20,216 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 166 states. [2021-10-05 21:13:20,219 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 166 to 102. [2021-10-05 21:13:20,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 102 states, 101 states have (on average 2.3267326732673266) internal successors, (235), 101 states have internal predecessors, (235), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:20,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 102 states to 102 states and 235 transitions. [2021-10-05 21:13:20,219 INFO L78 Accepts]: Start accepts. Automaton has 102 states and 235 transitions. Word has length 16 [2021-10-05 21:13:20,219 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:20,220 INFO L470 AbstractCegarLoop]: Abstraction has 102 states and 235 transitions. [2021-10-05 21:13:20,220 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:20,220 INFO L276 IsEmpty]: Start isEmpty. Operand 102 states and 235 transitions. [2021-10-05 21:13:20,220 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 17 [2021-10-05 21:13:20,220 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:20,220 INFO L512 BasicCegarLoop]: trace histogram [2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:20,247 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (44)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:20,421 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49,44 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:20,421 INFO L402 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:20,422 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:20,422 INFO L82 PathProgramCache]: Analyzing trace with hash 367696204, now seen corresponding path program 26 times [2021-10-05 21:13:20,423 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:20,424 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [403906701] [2021-10-05 21:13:20,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:20,424 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:20,438 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:20,540 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:20,540 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:20,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [403906701] [2021-10-05 21:13:20,540 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [403906701] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:20,540 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [586048810] [2021-10-05 21:13:20,541 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:20,541 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:20,542 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:20,543 INFO L229 MonitoredProcess]: Starting monitored process 45 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:20,543 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Waiting until timeout for monitored process [2021-10-05 21:13:21,234 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:21,234 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:21,235 INFO L263 TraceCheckSpWp]: Trace formula consists of 107 conjuncts, 25 conjunts are in the unsatisfiable core [2021-10-05 21:13:21,236 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:21,456 INFO L134 CoverageAnalysis]: Checked inductivity of 4 backedges. 0 proven. 4 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:21,456 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [586048810] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:21,456 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:21,456 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [8, 8] total 13 [2021-10-05 21:13:21,457 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1903500237] [2021-10-05 21:13:21,457 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 15 states [2021-10-05 21:13:21,457 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:21,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 15 interpolants. [2021-10-05 21:13:21,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=40, Invalid=170, Unknown=0, NotChecked=0, Total=210 [2021-10-05 21:13:21,459 INFO L87 Difference]: Start difference. First operand 102 states and 235 transitions. Second operand has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:21,674 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:21,674 INFO L93 Difference]: Finished difference Result 134 states and 284 transitions. [2021-10-05 21:13:21,674 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:21,675 INFO L78 Accepts]: Start accepts. Automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 16 [2021-10-05 21:13:21,675 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:21,676 INFO L225 Difference]: With dead ends: 134 [2021-10-05 21:13:21,676 INFO L226 Difference]: Without dead ends: 116 [2021-10-05 21:13:21,676 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 29 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 19 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 83 ImplicationChecksByTransitivity, 242.0ms TimeCoverageRelationStatistics Valid=86, Invalid=334, Unknown=0, NotChecked=0, Total=420 [2021-10-05 21:13:21,676 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 116 states. [2021-10-05 21:13:21,679 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 116 to 86. [2021-10-05 21:13:21,680 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2) internal successors, (187), 85 states have internal predecessors, (187), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:21,681 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 187 transitions. [2021-10-05 21:13:21,681 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 187 transitions. Word has length 16 [2021-10-05 21:13:21,681 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:21,681 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 187 transitions. [2021-10-05 21:13:21,681 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 15 states, 14 states have (on average 1.8571428571428572) internal successors, (26), 14 states have internal predecessors, (26), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:21,682 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 187 transitions. [2021-10-05 21:13:21,683 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:21,683 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:21,683 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:21,710 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (45)] Ended with exit code 0 [2021-10-05 21:13:21,893 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50,45 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:21,894 INFO L402 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:21,894 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:21,895 INFO L82 PathProgramCache]: Analyzing trace with hash 3823207, now seen corresponding path program 27 times [2021-10-05 21:13:21,895 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:21,895 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [410870463] [2021-10-05 21:13:21,895 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:21,896 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:21,914 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:22,014 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:22,014 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:22,014 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [410870463] [2021-10-05 21:13:22,015 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [410870463] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:22,015 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1459676754] [2021-10-05 21:13:22,015 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:22,015 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:22,016 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:22,017 INFO L229 MonitoredProcess]: Starting monitored process 46 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:22,038 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Waiting until timeout for monitored process [2021-10-05 21:13:22,718 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:13:22,718 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:22,719 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:22,720 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:22,984 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:22,985 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1459676754] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:22,985 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:22,986 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 21:13:22,986 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1048281232] [2021-10-05 21:13:22,986 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:22,987 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:22,987 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:22,988 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=51, Invalid=255, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:22,988 INFO L87 Difference]: Start difference. First operand 86 states and 187 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:23,340 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:23,340 INFO L93 Difference]: Finished difference Result 120 states and 241 transitions. [2021-10-05 21:13:23,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:13:23,342 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:23,342 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:23,360 INFO L225 Difference]: With dead ends: 120 [2021-10-05 21:13:23,361 INFO L226 Difference]: Without dead ends: 74 [2021-10-05 21:13:23,361 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 206 ImplicationChecksByTransitivity, 383.4ms TimeCoverageRelationStatistics Valid=141, Invalid=729, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:13:23,362 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 74 states. [2021-10-05 21:13:23,363 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 74 to 74. [2021-10-05 21:13:23,364 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 74 states, 73 states have (on average 2.2054794520547945) internal successors, (161), 73 states have internal predecessors, (161), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:23,364 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 74 states to 74 states and 161 transitions. [2021-10-05 21:13:23,365 INFO L78 Accepts]: Start accepts. Automaton has 74 states and 161 transitions. Word has length 17 [2021-10-05 21:13:23,365 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:23,365 INFO L470 AbstractCegarLoop]: Abstraction has 74 states and 161 transitions. [2021-10-05 21:13:23,365 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:23,366 INFO L276 IsEmpty]: Start isEmpty. Operand 74 states and 161 transitions. [2021-10-05 21:13:23,366 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:23,366 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:23,366 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:23,402 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (46)] Ended with exit code 0 [2021-10-05 21:13:23,580 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51,46 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:23,581 INFO L402 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:23,582 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:23,582 INFO L82 PathProgramCache]: Analyzing trace with hash 1779759551, now seen corresponding path program 28 times [2021-10-05 21:13:23,582 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:23,583 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [252233875] [2021-10-05 21:13:23,583 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:23,583 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:23,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:23,697 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:23,697 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:23,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [252233875] [2021-10-05 21:13:23,698 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [252233875] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:23,698 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [919710401] [2021-10-05 21:13:23,699 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:13:23,699 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:23,699 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:23,700 INFO L229 MonitoredProcess]: Starting monitored process 47 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:23,701 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Waiting until timeout for monitored process [2021-10-05 21:13:24,407 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:13:24,407 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:24,409 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 21:13:24,409 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:24,732 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:24,732 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [919710401] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:24,733 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:24,733 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:13:24,733 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1597900452] [2021-10-05 21:13:24,734 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:13:24,734 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:24,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:13:24,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=326, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:13:24,735 INFO L87 Difference]: Start difference. First operand 74 states and 161 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:25,227 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:25,227 INFO L93 Difference]: Finished difference Result 122 states and 244 transitions. [2021-10-05 21:13:25,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 19 states. [2021-10-05 21:13:25,228 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:25,228 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:25,229 INFO L225 Difference]: With dead ends: 122 [2021-10-05 21:13:25,229 INFO L226 Difference]: Without dead ends: 88 [2021-10-05 21:13:25,229 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 32 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 235 ImplicationChecksByTransitivity, 506.0ms TimeCoverageRelationStatistics Valid=163, Invalid=959, Unknown=0, NotChecked=0, Total=1122 [2021-10-05 21:13:25,230 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 88 states. [2021-10-05 21:13:25,231 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 88 to 80. [2021-10-05 21:13:25,232 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.2278481012658227) internal successors, (176), 79 states have internal predecessors, (176), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:25,232 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 176 transitions. [2021-10-05 21:13:25,232 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 176 transitions. Word has length 17 [2021-10-05 21:13:25,232 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:25,232 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 176 transitions. [2021-10-05 21:13:25,233 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:25,233 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 176 transitions. [2021-10-05 21:13:25,233 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:25,233 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:25,234 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:25,259 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (47)] Ended with exit code 0 [2021-10-05 21:13:25,437 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52,47 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:25,438 INFO L402 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:25,438 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:25,439 INFO L82 PathProgramCache]: Analyzing trace with hash -1077514479, now seen corresponding path program 29 times [2021-10-05 21:13:25,439 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:25,439 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [568174098] [2021-10-05 21:13:25,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:25,440 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:25,456 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:25,552 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:25,552 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:25,552 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [568174098] [2021-10-05 21:13:25,552 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [568174098] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:25,553 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1997802296] [2021-10-05 21:13:25,553 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:13:25,553 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:25,553 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:25,554 INFO L229 MonitoredProcess]: Starting monitored process 48 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:25,565 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Waiting until timeout for monitored process [2021-10-05 21:13:26,303 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:26,303 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:26,304 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 21:13:26,304 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:26,632 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:26,632 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1997802296] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:26,633 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:26,633 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:13:26,633 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1602372720] [2021-10-05 21:13:26,633 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:13:26,634 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:26,634 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:13:26,634 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=55, Invalid=325, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:13:26,635 INFO L87 Difference]: Start difference. First operand 80 states and 176 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:27,200 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:27,200 INFO L93 Difference]: Finished difference Result 148 states and 297 transitions. [2021-10-05 21:13:27,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 21:13:27,200 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:27,201 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:27,201 INFO L225 Difference]: With dead ends: 148 [2021-10-05 21:13:27,202 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:13:27,202 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 305 ImplicationChecksByTransitivity, 548.1ms TimeCoverageRelationStatistics Valid=188, Invalid=1144, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:13:27,202 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:13:27,204 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 86. [2021-10-05 21:13:27,205 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 86 states, 85 states have (on average 2.2941176470588234) internal successors, (195), 85 states have internal predecessors, (195), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:27,205 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 86 states to 86 states and 195 transitions. [2021-10-05 21:13:27,205 INFO L78 Accepts]: Start accepts. Automaton has 86 states and 195 transitions. Word has length 17 [2021-10-05 21:13:27,206 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:27,206 INFO L470 AbstractCegarLoop]: Abstraction has 86 states and 195 transitions. [2021-10-05 21:13:27,206 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:27,206 INFO L276 IsEmpty]: Start isEmpty. Operand 86 states and 195 transitions. [2021-10-05 21:13:27,207 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:27,207 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:27,207 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:27,250 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (48)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:27,417 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 48 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable53 [2021-10-05 21:13:27,417 INFO L402 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:27,418 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:27,418 INFO L82 PathProgramCache]: Analyzing trace with hash -1169684609, now seen corresponding path program 30 times [2021-10-05 21:13:27,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:27,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850476365] [2021-10-05 21:13:27,418 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:27,418 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:27,436 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:27,555 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:27,556 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:27,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850476365] [2021-10-05 21:13:27,556 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850476365] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:27,556 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1465937532] [2021-10-05 21:13:27,556 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:27,557 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:27,557 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:27,558 INFO L229 MonitoredProcess]: Starting monitored process 49 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:27,562 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Waiting until timeout for monitored process [2021-10-05 21:13:28,312 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 3 check-sat command(s) [2021-10-05 21:13:28,313 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:28,314 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:28,315 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:28,612 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:28,612 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1465937532] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:28,612 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:28,613 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 21:13:28,613 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1906412829] [2021-10-05 21:13:28,614 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:28,614 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:28,614 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:28,615 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:28,615 INFO L87 Difference]: Start difference. First operand 86 states and 195 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:29,011 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:29,011 INFO L93 Difference]: Finished difference Result 124 states and 247 transitions. [2021-10-05 21:13:29,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:29,012 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:29,012 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:29,013 INFO L225 Difference]: With dead ends: 124 [2021-10-05 21:13:29,013 INFO L226 Difference]: Without dead ends: 106 [2021-10-05 21:13:29,014 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 442.4ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-05 21:13:29,014 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 106 states. [2021-10-05 21:13:29,017 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 106 to 88. [2021-10-05 21:13:29,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 88 states, 87 states have (on average 2.2758620689655173) internal successors, (198), 87 states have internal predecessors, (198), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:29,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 88 states to 88 states and 198 transitions. [2021-10-05 21:13:29,018 INFO L78 Accepts]: Start accepts. Automaton has 88 states and 198 transitions. Word has length 17 [2021-10-05 21:13:29,018 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:29,018 INFO L470 AbstractCegarLoop]: Abstraction has 88 states and 198 transitions. [2021-10-05 21:13:29,018 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:29,019 INFO L276 IsEmpty]: Start isEmpty. Operand 88 states and 198 transitions. [2021-10-05 21:13:29,019 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:29,019 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:29,019 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:29,058 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (49)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:29,233 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 49 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable54 [2021-10-05 21:13:29,234 INFO L402 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:29,234 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:29,235 INFO L82 PathProgramCache]: Analyzing trace with hash 1407533627, now seen corresponding path program 31 times [2021-10-05 21:13:29,235 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:29,235 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1783978954] [2021-10-05 21:13:29,235 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:29,236 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:29,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:29,365 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:29,366 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:29,366 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1783978954] [2021-10-05 21:13:29,366 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1783978954] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:29,367 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1873724460] [2021-10-05 21:13:29,367 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:29,367 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:29,367 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:29,369 INFO L229 MonitoredProcess]: Starting monitored process 50 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:29,372 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Waiting until timeout for monitored process [2021-10-05 21:13:30,149 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:30,150 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:30,151 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:30,420 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:30,421 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1873724460] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:30,421 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:30,422 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 21:13:30,422 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1533030295] [2021-10-05 21:13:30,423 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:30,423 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:30,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:30,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=56, Invalid=250, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:30,424 INFO L87 Difference]: Start difference. First operand 88 states and 198 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:30,826 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:30,827 INFO L93 Difference]: Finished difference Result 104 states and 219 transitions. [2021-10-05 21:13:30,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:30,827 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:30,827 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:30,828 INFO L225 Difference]: With dead ends: 104 [2021-10-05 21:13:30,828 INFO L226 Difference]: Without dead ends: 94 [2021-10-05 21:13:30,829 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 250 ImplicationChecksByTransitivity, 446.6ms TimeCoverageRelationStatistics Valid=166, Invalid=826, Unknown=0, NotChecked=0, Total=992 [2021-10-05 21:13:30,829 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 94 states. [2021-10-05 21:13:30,830 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 94 to 90. [2021-10-05 21:13:30,831 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 90 states, 89 states have (on average 2.258426966292135) internal successors, (201), 89 states have internal predecessors, (201), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:30,832 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 90 states to 90 states and 201 transitions. [2021-10-05 21:13:30,832 INFO L78 Accepts]: Start accepts. Automaton has 90 states and 201 transitions. Word has length 17 [2021-10-05 21:13:30,832 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:30,833 INFO L470 AbstractCegarLoop]: Abstraction has 90 states and 201 transitions. [2021-10-05 21:13:30,834 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:30,834 INFO L276 IsEmpty]: Start isEmpty. Operand 90 states and 201 transitions. [2021-10-05 21:13:30,834 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:30,835 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:30,835 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:30,875 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (50)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:31,049 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 50 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable55 [2021-10-05 21:13:31,050 INFO L402 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:31,050 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:31,051 INFO L82 PathProgramCache]: Analyzing trace with hash 1621254829, now seen corresponding path program 32 times [2021-10-05 21:13:31,051 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:31,051 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2103068190] [2021-10-05 21:13:31,051 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:31,051 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:31,073 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:31,168 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:31,168 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:31,169 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2103068190] [2021-10-05 21:13:31,169 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2103068190] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:31,170 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1906348399] [2021-10-05 21:13:31,170 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:31,170 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:31,170 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:31,171 INFO L229 MonitoredProcess]: Starting monitored process 51 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:31,176 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Waiting until timeout for monitored process [2021-10-05 21:13:31,942 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:31,942 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:31,944 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:31,944 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:32,207 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:32,207 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1906348399] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:32,207 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:32,207 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 16 [2021-10-05 21:13:32,208 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [868105040] [2021-10-05 21:13:32,208 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:32,208 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:32,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:32,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:32,209 INFO L87 Difference]: Start difference. First operand 90 states and 201 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:32,713 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:32,714 INFO L93 Difference]: Finished difference Result 206 states and 435 transitions. [2021-10-05 21:13:32,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 25 states. [2021-10-05 21:13:32,714 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:32,715 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:32,715 INFO L225 Difference]: With dead ends: 206 [2021-10-05 21:13:32,716 INFO L226 Difference]: Without dead ends: 156 [2021-10-05 21:13:32,716 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 9 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 454.4ms TimeCoverageRelationStatistics Valid=183, Invalid=873, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:13:32,716 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 156 states. [2021-10-05 21:13:32,718 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 156 to 108. [2021-10-05 21:13:32,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:32,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-05 21:13:32,719 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-05 21:13:32,720 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:32,720 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-05 21:13:32,720 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:32,720 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-05 21:13:32,721 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:32,721 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:32,721 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:32,748 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (51)] Ended with exit code 0 [2021-10-05 21:13:32,926 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56,51 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:32,927 INFO L402 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:32,927 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:32,928 INFO L82 PathProgramCache]: Analyzing trace with hash 1529084699, now seen corresponding path program 33 times [2021-10-05 21:13:32,928 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:32,928 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [860711054] [2021-10-05 21:13:32,928 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:32,929 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:32,948 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:33,057 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:33,057 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [860711054] [2021-10-05 21:13:33,057 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [860711054] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:33,057 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [946347984] [2021-10-05 21:13:33,058 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:33,058 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:33,058 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:33,060 INFO L229 MonitoredProcess]: Starting monitored process 52 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:33,063 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Waiting until timeout for monitored process [2021-10-05 21:13:33,866 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 3 check-sat command(s) [2021-10-05 21:13:33,866 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:33,868 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 21:13:33,869 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:34,175 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:34,175 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [946347984] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:34,175 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:34,175 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:13:34,175 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [229244848] [2021-10-05 21:13:34,176 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:13:34,176 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:34,177 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:13:34,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:13:34,177 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:34,738 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:34,738 INFO L93 Difference]: Finished difference Result 180 states and 376 transitions. [2021-10-05 21:13:34,739 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 21:13:34,739 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:34,739 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:34,741 INFO L225 Difference]: With dead ends: 180 [2021-10-05 21:13:34,741 INFO L226 Difference]: Without dead ends: 162 [2021-10-05 21:13:34,741 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 342 ImplicationChecksByTransitivity, 585.6ms TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:13:34,741 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 162 states. [2021-10-05 21:13:34,743 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 162 to 122. [2021-10-05 21:13:34,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 122 states, 121 states have (on average 2.355371900826446) internal successors, (285), 121 states have internal predecessors, (285), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:34,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 122 states to 122 states and 285 transitions. [2021-10-05 21:13:34,744 INFO L78 Accepts]: Start accepts. Automaton has 122 states and 285 transitions. Word has length 17 [2021-10-05 21:13:34,745 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:34,745 INFO L470 AbstractCegarLoop]: Abstraction has 122 states and 285 transitions. [2021-10-05 21:13:34,745 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:34,745 INFO L276 IsEmpty]: Start isEmpty. Operand 122 states and 285 transitions. [2021-10-05 21:13:34,746 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:34,746 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:34,746 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:34,773 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (52)] Ended with exit code 0 [2021-10-05 21:13:34,950 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 52 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable57 [2021-10-05 21:13:34,951 INFO L402 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:34,951 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:34,951 INFO L82 PathProgramCache]: Analyzing trace with hash -188664361, now seen corresponding path program 34 times [2021-10-05 21:13:34,952 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:34,952 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [843270920] [2021-10-05 21:13:34,952 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:34,953 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:34,969 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:35,071 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:35,072 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [843270920] [2021-10-05 21:13:35,072 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [843270920] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:35,072 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [154446482] [2021-10-05 21:13:35,072 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:13:35,072 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:35,073 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:35,073 INFO L229 MonitoredProcess]: Starting monitored process 53 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:35,075 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Waiting until timeout for monitored process [2021-10-05 21:13:35,914 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:13:35,914 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:35,915 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 21:13:35,916 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:36,269 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:36,269 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [154446482] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:36,269 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:36,269 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:13:36,270 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [425950052] [2021-10-05 21:13:36,270 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:13:36,270 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:36,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:13:36,270 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=63, Invalid=317, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:13:36,273 INFO L87 Difference]: Start difference. First operand 122 states and 285 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:36,895 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:36,896 INFO L93 Difference]: Finished difference Result 168 states and 356 transitions. [2021-10-05 21:13:36,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 24 states. [2021-10-05 21:13:36,896 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:36,897 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:36,898 INFO L225 Difference]: With dead ends: 168 [2021-10-05 21:13:36,898 INFO L226 Difference]: Without dead ends: 158 [2021-10-05 21:13:36,899 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 42 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 35 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 340 ImplicationChecksByTransitivity, 606.5ms TimeCoverageRelationStatistics Valid=214, Invalid=1118, Unknown=0, NotChecked=0, Total=1332 [2021-10-05 21:13:36,899 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 158 states. [2021-10-05 21:13:36,901 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 158 to 108. [2021-10-05 21:13:36,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.317757009345794) internal successors, (248), 107 states have internal predecessors, (248), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:36,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 248 transitions. [2021-10-05 21:13:36,903 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 248 transitions. Word has length 17 [2021-10-05 21:13:36,903 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:36,903 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 248 transitions. [2021-10-05 21:13:36,903 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:36,903 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 248 transitions. [2021-10-05 21:13:36,904 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:36,904 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:36,904 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:36,944 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (53)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:37,119 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58,53 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:37,120 INFO L402 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:37,120 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:37,121 INFO L82 PathProgramCache]: Analyzing trace with hash -1784659353, now seen corresponding path program 35 times [2021-10-05 21:13:37,121 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:37,121 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1861334302] [2021-10-05 21:13:37,122 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:37,122 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:37,139 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:37,244 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:37,245 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:37,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1861334302] [2021-10-05 21:13:37,245 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1861334302] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:37,245 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [731828823] [2021-10-05 21:13:37,245 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:13:37,246 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:37,246 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:37,252 INFO L229 MonitoredProcess]: Starting monitored process 54 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:37,282 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Waiting until timeout for monitored process [2021-10-05 21:13:38,092 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:38,092 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:38,093 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:38,094 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:38,345 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:38,345 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [731828823] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:38,345 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:38,346 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:38,346 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [771745868] [2021-10-05 21:13:38,346 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:38,347 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:38,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:38,348 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:38,348 INFO L87 Difference]: Start difference. First operand 108 states and 248 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:38,677 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:38,678 INFO L93 Difference]: Finished difference Result 134 states and 288 transitions. [2021-10-05 21:13:38,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:38,678 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:38,679 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:38,680 INFO L225 Difference]: With dead ends: 134 [2021-10-05 21:13:38,680 INFO L226 Difference]: Without dead ends: 100 [2021-10-05 21:13:38,680 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 163 ImplicationChecksByTransitivity, 355.6ms TimeCoverageRelationStatistics Valid=115, Invalid=587, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:13:38,681 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 100 states. [2021-10-05 21:13:38,683 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 100 to 100. [2021-10-05 21:13:38,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 100 states, 99 states have (on average 2.323232323232323) internal successors, (230), 99 states have internal predecessors, (230), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:38,684 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 100 states to 100 states and 230 transitions. [2021-10-05 21:13:38,684 INFO L78 Accepts]: Start accepts. Automaton has 100 states and 230 transitions. Word has length 17 [2021-10-05 21:13:38,684 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:38,685 INFO L470 AbstractCegarLoop]: Abstraction has 100 states and 230 transitions. [2021-10-05 21:13:38,685 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:38,685 INFO L276 IsEmpty]: Start isEmpty. Operand 100 states and 230 transitions. [2021-10-05 21:13:38,685 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:38,686 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:38,686 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:38,712 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (54)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:38,886 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 54 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable59 [2021-10-05 21:13:38,887 INFO L402 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:38,887 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:38,887 INFO L82 PathProgramCache]: Analyzing trace with hash -346966087, now seen corresponding path program 36 times [2021-10-05 21:13:38,888 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:38,888 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1604013605] [2021-10-05 21:13:38,888 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:38,889 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:38,904 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:39,010 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:39,010 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:39,010 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1604013605] [2021-10-05 21:13:39,011 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1604013605] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:39,011 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1158434755] [2021-10-05 21:13:39,011 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:39,011 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:39,011 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:39,012 INFO L229 MonitoredProcess]: Starting monitored process 55 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:39,014 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Waiting until timeout for monitored process [2021-10-05 21:13:39,884 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 2 check-sat command(s) [2021-10-05 21:13:39,884 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:39,886 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:39,886 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:40,130 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:40,131 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1158434755] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:40,131 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:40,131 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:40,131 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928263301] [2021-10-05 21:13:40,132 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:40,132 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:40,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:40,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=47, Invalid=225, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:40,133 INFO L87 Difference]: Start difference. First operand 100 states and 230 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:40,447 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:40,447 INFO L93 Difference]: Finished difference Result 158 states and 338 transitions. [2021-10-05 21:13:40,447 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:40,448 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:40,448 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:40,449 INFO L225 Difference]: With dead ends: 158 [2021-10-05 21:13:40,449 INFO L226 Difference]: Without dead ends: 132 [2021-10-05 21:13:40,449 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 170 ImplicationChecksByTransitivity, 343.0ms TimeCoverageRelationStatistics Valid=128, Invalid=628, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:13:40,450 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 132 states. [2021-10-05 21:13:40,452 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 132 to 106. [2021-10-05 21:13:40,453 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 106 states, 105 states have (on average 2.3714285714285714) internal successors, (249), 105 states have internal predecessors, (249), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:40,453 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 106 states to 106 states and 249 transitions. [2021-10-05 21:13:40,453 INFO L78 Accepts]: Start accepts. Automaton has 106 states and 249 transitions. Word has length 17 [2021-10-05 21:13:40,453 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:40,454 INFO L470 AbstractCegarLoop]: Abstraction has 106 states and 249 transitions. [2021-10-05 21:13:40,454 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:40,454 INFO L276 IsEmpty]: Start isEmpty. Operand 106 states and 249 transitions. [2021-10-05 21:13:40,454 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:40,455 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:40,455 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:40,486 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (55)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:40,670 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60,55 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:40,671 INFO L402 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:40,671 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:40,671 INFO L82 PathProgramCache]: Analyzing trace with hash -439136217, now seen corresponding path program 37 times [2021-10-05 21:13:40,672 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:40,672 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2063409087] [2021-10-05 21:13:40,672 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:40,672 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:40,706 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:40,820 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:40,820 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:40,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2063409087] [2021-10-05 21:13:40,821 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2063409087] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:40,821 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1419297655] [2021-10-05 21:13:40,821 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:40,821 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:40,821 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:40,824 INFO L229 MonitoredProcess]: Starting monitored process 56 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:40,841 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Waiting until timeout for monitored process [2021-10-05 21:13:41,690 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:41,691 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:41,692 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:41,942 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:41,942 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1419297655] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:41,943 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:41,943 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:41,943 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [437655497] [2021-10-05 21:13:41,943 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:41,944 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:41,944 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:41,944 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:41,944 INFO L87 Difference]: Start difference. First operand 106 states and 249 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:42,329 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:42,329 INFO L93 Difference]: Finished difference Result 142 states and 298 transitions. [2021-10-05 21:13:42,330 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:13:42,330 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:42,330 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:42,331 INFO L225 Difference]: With dead ends: 142 [2021-10-05 21:13:42,332 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 21:13:42,332 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 381.2ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:13:42,332 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 21:13:42,335 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 108. [2021-10-05 21:13:42,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3551401869158877) internal successors, (252), 107 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:42,336 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 252 transitions. [2021-10-05 21:13:42,336 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 252 transitions. Word has length 17 [2021-10-05 21:13:42,336 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:42,336 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 252 transitions. [2021-10-05 21:13:42,336 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:42,337 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 252 transitions. [2021-10-05 21:13:42,337 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:42,337 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:42,337 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:42,375 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (56)] Ended with exit code 0 [2021-10-05 21:13:42,551 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61,56 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:42,552 INFO L402 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:42,552 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:42,552 INFO L82 PathProgramCache]: Analyzing trace with hash 2138082019, now seen corresponding path program 38 times [2021-10-05 21:13:42,553 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:42,553 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1902171632] [2021-10-05 21:13:42,553 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:42,554 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:42,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:42,675 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:42,676 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:42,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1902171632] [2021-10-05 21:13:42,676 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1902171632] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:42,676 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1643854106] [2021-10-05 21:13:42,676 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:42,676 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:42,677 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:42,678 INFO L229 MonitoredProcess]: Starting monitored process 57 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:42,682 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Waiting until timeout for monitored process [2021-10-05 21:13:43,565 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:43,565 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:43,566 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:43,567 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:43,822 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:43,822 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1643854106] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:43,822 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:43,823 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:43,823 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [500369144] [2021-10-05 21:13:43,823 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:43,823 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:43,824 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:43,824 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=220, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:43,824 INFO L87 Difference]: Start difference. First operand 108 states and 252 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:44,195 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:44,196 INFO L93 Difference]: Finished difference Result 122 states and 270 transitions. [2021-10-05 21:13:44,196 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 16 states. [2021-10-05 21:13:44,196 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:44,197 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:44,198 INFO L225 Difference]: With dead ends: 122 [2021-10-05 21:13:44,198 INFO L226 Difference]: Without dead ends: 112 [2021-10-05 21:13:44,198 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 36 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 177 ImplicationChecksByTransitivity, 383.5ms TimeCoverageRelationStatistics Valid=137, Invalid=619, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:13:44,198 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 112 states. [2021-10-05 21:13:44,200 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 112 to 108. [2021-10-05 21:13:44,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 108 states, 107 states have (on average 2.3551401869158877) internal successors, (252), 107 states have internal predecessors, (252), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:44,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 108 states to 108 states and 252 transitions. [2021-10-05 21:13:44,201 INFO L78 Accepts]: Start accepts. Automaton has 108 states and 252 transitions. Word has length 17 [2021-10-05 21:13:44,201 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:44,201 INFO L470 AbstractCegarLoop]: Abstraction has 108 states and 252 transitions. [2021-10-05 21:13:44,202 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:44,202 INFO L276 IsEmpty]: Start isEmpty. Operand 108 states and 252 transitions. [2021-10-05 21:13:44,202 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:44,202 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:44,203 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:44,238 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (57)] Ended with exit code 0 [2021-10-05 21:13:44,416 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62,57 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:44,417 INFO L402 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:44,417 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:44,418 INFO L82 PathProgramCache]: Analyzing trace with hash 728745069, now seen corresponding path program 39 times [2021-10-05 21:13:44,418 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:44,418 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128131705] [2021-10-05 21:13:44,419 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:44,419 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:44,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:44,534 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:44,534 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:44,534 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128131705] [2021-10-05 21:13:44,534 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128131705] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:44,535 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [94109138] [2021-10-05 21:13:44,535 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:44,535 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:44,535 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:44,537 INFO L229 MonitoredProcess]: Starting monitored process 58 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:44,537 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Waiting until timeout for monitored process [2021-10-05 21:13:45,424 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 2 check-sat command(s) [2021-10-05 21:13:45,424 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:45,426 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:45,427 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:45,691 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:45,692 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [94109138] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:45,692 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:45,692 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:45,692 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448407283] [2021-10-05 21:13:45,693 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:45,693 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:45,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:45,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=49, Invalid=223, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:45,694 INFO L87 Difference]: Start difference. First operand 108 states and 252 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:46,109 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:46,110 INFO L93 Difference]: Finished difference Result 148 states and 308 transitions. [2021-10-05 21:13:46,110 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:46,110 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:46,111 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:46,111 INFO L225 Difference]: With dead ends: 148 [2021-10-05 21:13:46,112 INFO L226 Difference]: Without dead ends: 122 [2021-10-05 21:13:46,112 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 38 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 196 ImplicationChecksByTransitivity, 421.1ms TimeCoverageRelationStatistics Valid=160, Invalid=710, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:13:46,113 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 122 states. [2021-10-05 21:13:46,114 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 122 to 96. [2021-10-05 21:13:46,115 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.3473684210526318) internal successors, (223), 95 states have internal predecessors, (223), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:46,115 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 223 transitions. [2021-10-05 21:13:46,115 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 223 transitions. Word has length 17 [2021-10-05 21:13:46,116 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:46,116 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 223 transitions. [2021-10-05 21:13:46,116 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:46,116 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 223 transitions. [2021-10-05 21:13:46,117 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:46,117 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:46,117 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:46,145 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (58)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:46,318 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63,58 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:46,318 INFO L402 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:46,319 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:46,319 INFO L82 PathProgramCache]: Analyzing trace with hash 636574939, now seen corresponding path program 40 times [2021-10-05 21:13:46,319 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:46,319 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1677168315] [2021-10-05 21:13:46,319 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:46,320 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:46,336 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:46,446 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:46,446 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:46,446 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1677168315] [2021-10-05 21:13:46,447 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1677168315] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:46,447 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1375115211] [2021-10-05 21:13:46,447 INFO L93 rtionOrderModulation]: Changing assertion order to TERMS_WITH_SMALL_CONSTANTS_FIRST [2021-10-05 21:13:46,447 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:46,447 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:46,448 INFO L229 MonitoredProcess]: Starting monitored process 59 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:46,474 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Waiting until timeout for monitored process [2021-10-05 21:13:47,322 INFO L228 tOrderPrioritization]: Assert order TERMS_WITH_SMALL_CONSTANTS_FIRST issued 0 check-sat command(s) [2021-10-05 21:13:47,322 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:47,323 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 30 conjunts are in the unsatisfiable core [2021-10-05 21:13:47,324 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:47,674 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:47,675 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1375115211] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:47,675 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:47,675 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 18 [2021-10-05 21:13:47,676 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [642336232] [2021-10-05 21:13:47,676 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 20 states [2021-10-05 21:13:47,677 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:47,677 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 20 interpolants. [2021-10-05 21:13:47,678 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=68, Invalid=312, Unknown=0, NotChecked=0, Total=380 [2021-10-05 21:13:47,680 INFO L87 Difference]: Start difference. First operand 96 states and 223 transitions. Second operand has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:48,120 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:48,120 INFO L93 Difference]: Finished difference Result 132 states and 268 transitions. [2021-10-05 21:13:48,121 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:48,121 INFO L78 Accepts]: Start accepts. Automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:48,121 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:48,122 INFO L225 Difference]: With dead ends: 132 [2021-10-05 21:13:48,122 INFO L226 Difference]: Without dead ends: 114 [2021-10-05 21:13:48,123 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 7 SyntacticMatches, 0 SemanticMatches, 28 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 203 ImplicationChecksByTransitivity, 468.4ms TimeCoverageRelationStatistics Valid=156, Invalid=714, Unknown=0, NotChecked=0, Total=870 [2021-10-05 21:13:48,123 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 114 states. [2021-10-05 21:13:48,125 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 114 to 96. [2021-10-05 21:13:48,125 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 96 states, 95 states have (on average 2.305263157894737) internal successors, (219), 95 states have internal predecessors, (219), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:48,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 96 states to 96 states and 219 transitions. [2021-10-05 21:13:48,126 INFO L78 Accepts]: Start accepts. Automaton has 96 states and 219 transitions. Word has length 17 [2021-10-05 21:13:48,126 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:48,126 INFO L470 AbstractCegarLoop]: Abstraction has 96 states and 219 transitions. [2021-10-05 21:13:48,126 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 20 states, 19 states have (on average 1.7894736842105263) internal successors, (34), 19 states have internal predecessors, (34), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:48,127 INFO L276 IsEmpty]: Start isEmpty. Operand 96 states and 219 transitions. [2021-10-05 21:13:48,127 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 18 [2021-10-05 21:13:48,127 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:48,127 INFO L512 BasicCegarLoop]: trace histogram [2, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:48,158 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (59)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:48,340 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 59 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable64 [2021-10-05 21:13:48,341 INFO L402 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:48,341 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:48,342 INFO L82 PathProgramCache]: Analyzing trace with hash -1081174121, now seen corresponding path program 41 times [2021-10-05 21:13:48,342 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:48,342 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1728645235] [2021-10-05 21:13:48,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:48,343 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:48,360 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:48,482 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:48,482 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:48,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1728645235] [2021-10-05 21:13:48,483 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1728645235] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:48,483 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [240083567] [2021-10-05 21:13:48,483 INFO L93 rtionOrderModulation]: Changing assertion order to INSIDE_LOOP_FIRST1 [2021-10-05 21:13:48,483 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:48,484 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:48,489 INFO L229 MonitoredProcess]: Starting monitored process 60 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:48,504 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Waiting until timeout for monitored process [2021-10-05 21:13:49,423 INFO L228 tOrderPrioritization]: Assert order INSIDE_LOOP_FIRST1 issued 3 check-sat command(s) [2021-10-05 21:13:49,423 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:49,424 INFO L263 TraceCheckSpWp]: Trace formula consists of 117 conjuncts, 29 conjunts are in the unsatisfiable core [2021-10-05 21:13:49,425 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:49,710 INFO L134 CoverageAnalysis]: Checked inductivity of 6 backedges. 0 proven. 6 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:49,711 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [240083567] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:49,711 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:49,711 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 9] total 15 [2021-10-05 21:13:49,712 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156994524] [2021-10-05 21:13:49,712 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 17 states [2021-10-05 21:13:49,712 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:49,712 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 17 interpolants. [2021-10-05 21:13:49,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=218, Unknown=0, NotChecked=0, Total=272 [2021-10-05 21:13:49,713 INFO L87 Difference]: Start difference. First operand 96 states and 219 transitions. Second operand has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:50,125 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:50,126 INFO L93 Difference]: Finished difference Result 120 states and 250 transitions. [2021-10-05 21:13:50,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2021-10-05 21:13:50,126 INFO L78 Accepts]: Start accepts. Automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 17 [2021-10-05 21:13:50,127 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:50,128 INFO L225 Difference]: With dead ends: 120 [2021-10-05 21:13:50,128 INFO L226 Difference]: Without dead ends: 110 [2021-10-05 21:13:50,128 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 35 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 25 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 154 ImplicationChecksByTransitivity, 423.2ms TimeCoverageRelationStatistics Valid=138, Invalid=564, Unknown=0, NotChecked=0, Total=702 [2021-10-05 21:13:50,128 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 110 states. [2021-10-05 21:13:50,130 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 110 to 70. [2021-10-05 21:13:50,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 70 states, 69 states have (on average 2.2318840579710146) internal successors, (154), 69 states have internal predecessors, (154), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:50,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 70 states to 70 states and 154 transitions. [2021-10-05 21:13:50,131 INFO L78 Accepts]: Start accepts. Automaton has 70 states and 154 transitions. Word has length 17 [2021-10-05 21:13:50,131 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:50,132 INFO L470 AbstractCegarLoop]: Abstraction has 70 states and 154 transitions. [2021-10-05 21:13:50,132 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 17 states, 16 states have (on average 1.75) internal successors, (28), 16 states have internal predecessors, (28), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:50,132 INFO L276 IsEmpty]: Start isEmpty. Operand 70 states and 154 transitions. [2021-10-05 21:13:50,132 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 21:13:50,133 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:50,133 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:50,166 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (60)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:50,347 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65,60 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:50,348 INFO L402 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:50,348 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:50,348 INFO L82 PathProgramCache]: Analyzing trace with hash -1814014008, now seen corresponding path program 42 times [2021-10-05 21:13:50,349 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:50,349 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1805907240] [2021-10-05 21:13:50,349 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:50,350 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:50,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:50,484 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:50,485 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:50,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1805907240] [2021-10-05 21:13:50,485 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1805907240] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:50,485 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [81350673] [2021-10-05 21:13:50,485 INFO L93 rtionOrderModulation]: Changing assertion order to MIX_INSIDE_OUTSIDE [2021-10-05 21:13:50,486 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:50,486 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:50,487 INFO L229 MonitoredProcess]: Starting monitored process 61 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:50,509 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Waiting until timeout for monitored process [2021-10-05 21:13:51,375 INFO L228 tOrderPrioritization]: Assert order MIX_INSIDE_OUTSIDE issued 4 check-sat command(s) [2021-10-05 21:13:51,375 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:51,376 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:13:51,377 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:51,689 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:51,689 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [81350673] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:51,689 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:51,689 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 21:13:51,690 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [492459927] [2021-10-05 21:13:51,690 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:13:51,690 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:51,691 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:13:51,691 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:13:51,691 INFO L87 Difference]: Start difference. First operand 70 states and 154 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:52,142 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:52,142 INFO L93 Difference]: Finished difference Result 142 states and 290 transitions. [2021-10-05 21:13:52,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 22 states. [2021-10-05 21:13:52,143 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 21:13:52,143 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:52,144 INFO L225 Difference]: With dead ends: 142 [2021-10-05 21:13:52,144 INFO L226 Difference]: Without dead ends: 124 [2021-10-05 21:13:52,145 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 40 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 30 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 256 ImplicationChecksByTransitivity, 446.4ms TimeCoverageRelationStatistics Valid=163, Invalid=829, Unknown=0, NotChecked=0, Total=992 [2021-10-05 21:13:52,145 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 124 states. [2021-10-05 21:13:52,147 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 124 to 80. [2021-10-05 21:13:52,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 80 states, 79 states have (on average 2.3037974683544302) internal successors, (182), 79 states have internal predecessors, (182), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:52,148 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 80 states to 80 states and 182 transitions. [2021-10-05 21:13:52,148 INFO L78 Accepts]: Start accepts. Automaton has 80 states and 182 transitions. Word has length 18 [2021-10-05 21:13:52,148 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:52,148 INFO L470 AbstractCegarLoop]: Abstraction has 80 states and 182 transitions. [2021-10-05 21:13:52,148 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:52,149 INFO L276 IsEmpty]: Start isEmpty. Operand 80 states and 182 transitions. [2021-10-05 21:13:52,149 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 21:13:52,149 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:52,149 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:52,187 INFO L552 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (61)] Ended with exit code 0 [2021-10-05 21:13:52,365 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 61 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable66 [2021-10-05 21:13:52,365 INFO L402 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:52,366 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:52,366 INFO L82 PathProgramCache]: Analyzing trace with hash 763204228, now seen corresponding path program 43 times [2021-10-05 21:13:52,367 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:52,367 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [689291160] [2021-10-05 21:13:52,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:52,368 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:52,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:52,505 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:52,505 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:52,505 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [689291160] [2021-10-05 21:13:52,506 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [689291160] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:52,506 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [238046455] [2021-10-05 21:13:52,506 INFO L93 rtionOrderModulation]: Changing assertion order to NOT_INCREMENTALLY [2021-10-05 21:13:52,506 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:52,507 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:52,509 INFO L229 MonitoredProcess]: Starting monitored process 62 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:52,535 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Waiting until timeout for monitored process [2021-10-05 21:13:53,446 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:53,447 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:13:53,447 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:53,760 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:53,761 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [238046455] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:53,761 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:53,762 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 21:13:53,762 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [478741574] [2021-10-05 21:13:53,763 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:13:53,763 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:53,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:13:53,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=57, Invalid=285, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:13:53,764 INFO L87 Difference]: Start difference. First operand 80 states and 182 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:54,275 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:54,275 INFO L93 Difference]: Finished difference Result 138 states and 282 transitions. [2021-10-05 21:13:54,275 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 23 states. [2021-10-05 21:13:54,276 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 21:13:54,276 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:54,277 INFO L225 Difference]: With dead ends: 138 [2021-10-05 21:13:54,277 INFO L226 Difference]: Without dead ends: 128 [2021-10-05 21:13:54,277 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 41 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 31 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 268 ImplicationChecksByTransitivity, 480.0ms TimeCoverageRelationStatistics Valid=175, Invalid=881, Unknown=0, NotChecked=0, Total=1056 [2021-10-05 21:13:54,277 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 128 states. [2021-10-05 21:13:54,278 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 128 to 64. [2021-10-05 21:13:54,279 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 64 states, 63 states have (on average 2.1587301587301586) internal successors, (136), 63 states have internal predecessors, (136), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:54,279 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 64 states to 64 states and 136 transitions. [2021-10-05 21:13:54,279 INFO L78 Accepts]: Start accepts. Automaton has 64 states and 136 transitions. Word has length 18 [2021-10-05 21:13:54,279 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:54,279 INFO L470 AbstractCegarLoop]: Abstraction has 64 states and 136 transitions. [2021-10-05 21:13:54,279 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:54,279 INFO L276 IsEmpty]: Start isEmpty. Operand 64 states and 136 transitions. [2021-10-05 21:13:54,280 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 21:13:54,280 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:54,280 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:54,305 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (62)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:54,480 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 62 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable67 [2021-10-05 21:13:54,481 INFO L402 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:54,481 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:54,482 INFO L82 PathProgramCache]: Analyzing trace with hash -18366322, now seen corresponding path program 44 times [2021-10-05 21:13:54,482 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:54,483 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1737323912] [2021-10-05 21:13:54,483 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:54,484 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:54,501 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:54,632 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:54,632 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:54,632 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1737323912] [2021-10-05 21:13:54,633 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1737323912] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:54,633 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [1655600958] [2021-10-05 21:13:54,633 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST1 [2021-10-05 21:13:54,633 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:54,633 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:54,636 INFO L229 MonitoredProcess]: Starting monitored process 63 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:54,637 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Waiting until timeout for monitored process [2021-10-05 21:13:55,590 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST1 issued 2 check-sat command(s) [2021-10-05 21:13:55,591 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:55,592 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:13:55,592 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:55,873 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:55,873 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [1655600958] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:55,873 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:55,873 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 17 [2021-10-05 21:13:55,874 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [145542169] [2021-10-05 21:13:55,874 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 19 states [2021-10-05 21:13:55,874 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:55,875 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 19 interpolants. [2021-10-05 21:13:55,875 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=54, Invalid=288, Unknown=0, NotChecked=0, Total=342 [2021-10-05 21:13:55,875 INFO L87 Difference]: Start difference. First operand 64 states and 136 transitions. Second operand has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:56,302 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:56,302 INFO L93 Difference]: Finished difference Result 94 states and 190 transitions. [2021-10-05 21:13:56,303 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 21 states. [2021-10-05 21:13:56,303 INFO L78 Accepts]: Start accepts. Automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 21:13:56,303 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:56,304 INFO L225 Difference]: With dead ends: 94 [2021-10-05 21:13:56,304 INFO L226 Difference]: Without dead ends: 36 [2021-10-05 21:13:56,305 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 39 GetRequests, 10 SyntacticMatches, 0 SemanticMatches, 29 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 228 ImplicationChecksByTransitivity, 423.1ms TimeCoverageRelationStatistics Valid=151, Invalid=779, Unknown=0, NotChecked=0, Total=930 [2021-10-05 21:13:56,305 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 36 states. [2021-10-05 21:13:56,306 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 36 to 36. [2021-10-05 21:13:56,306 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 36 states, 35 states have (on average 1.8857142857142857) internal successors, (66), 35 states have internal predecessors, (66), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:56,306 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 36 states to 36 states and 66 transitions. [2021-10-05 21:13:56,307 INFO L78 Accepts]: Start accepts. Automaton has 36 states and 66 transitions. Word has length 18 [2021-10-05 21:13:56,307 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:56,307 INFO L470 AbstractCegarLoop]: Abstraction has 36 states and 66 transitions. [2021-10-05 21:13:56,307 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 19 states, 18 states have (on average 1.7777777777777777) internal successors, (32), 18 states have internal predecessors, (32), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:56,307 INFO L276 IsEmpty]: Start isEmpty. Operand 36 states and 66 transitions. [2021-10-05 21:13:56,308 INFO L282 IsEmpty]: Finished isEmpty. Found accepting run of length 19 [2021-10-05 21:13:56,308 INFO L504 BasicCegarLoop]: Found error trace [2021-10-05 21:13:56,308 INFO L512 BasicCegarLoop]: trace histogram [3, 2, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2021-10-05 21:13:56,350 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (63)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:56,514 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: 63 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true,SelfDestructingSolverStorable68 [2021-10-05 21:13:56,515 INFO L402 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION === [ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION, ULTIMATE.startErr0INUSE_VIOLATION, ULTIMATE.startErr1INUSE_VIOLATION] === [2021-10-05 21:13:56,515 INFO L144 PredicateUnifier]: Initialized classic predicate unifier [2021-10-05 21:13:56,515 INFO L82 PathProgramCache]: Analyzing trace with hash 1153797350, now seen corresponding path program 45 times [2021-10-05 21:13:56,515 INFO L121 FreeRefinementEngine]: Executing refinement strategy CAMEL [2021-10-05 21:13:56,515 INFO L332 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1098521092] [2021-10-05 21:13:56,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2021-10-05 21:13:56,516 INFO L128 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2021-10-05 21:13:56,541 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2021-10-05 21:13:56,671 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:56,671 INFO L139 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2021-10-05 21:13:56,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1098521092] [2021-10-05 21:13:56,672 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1098521092] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:56,672 INFO L332 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleZ3 [160685299] [2021-10-05 21:13:56,672 INFO L93 rtionOrderModulation]: Changing assertion order to OUTSIDE_LOOP_FIRST2 [2021-10-05 21:13:56,673 INFO L170 SolverBuilder]: Constructing external solver with command: z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:56,673 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 [2021-10-05 21:13:56,674 INFO L229 MonitoredProcess]: Starting monitored process 64 with /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (exit command is (exit), workingDir is null) [2021-10-05 21:13:56,675 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Waiting until timeout for monitored process [2021-10-05 21:13:57,687 INFO L228 tOrderPrioritization]: Assert order OUTSIDE_LOOP_FIRST2 issued 4 check-sat command(s) [2021-10-05 21:13:57,688 INFO L229 tOrderPrioritization]: Conjunction of SSA is unsat [2021-10-05 21:13:57,689 INFO L263 TraceCheckSpWp]: Trace formula consists of 122 conjuncts, 33 conjunts are in the unsatisfiable core [2021-10-05 21:13:57,690 INFO L286 TraceCheckSpWp]: Computing forward predicates... [2021-10-05 21:13:57,972 INFO L134 CoverageAnalysis]: Checked inductivity of 9 backedges. 0 proven. 9 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2021-10-05 21:13:57,973 INFO L160 FreeRefinementEngine]: IpTcStrategyModuleZ3 [160685299] provided 0 perfect and 1 imperfect interpolant sequences [2021-10-05 21:13:57,973 INFO L186 FreeRefinementEngine]: Constructing automaton from 0 perfect and 2 imperfect interpolant sequences. [2021-10-05 21:13:57,973 INFO L199 FreeRefinementEngine]: Number of different interpolants: perfect sequences [] imperfect sequences [9, 10] total 16 [2021-10-05 21:13:57,973 INFO L115 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1792630614] [2021-10-05 21:13:57,974 INFO L546 AbstractCegarLoop]: INTERPOLANT automaton has 18 states [2021-10-05 21:13:57,974 INFO L103 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2021-10-05 21:13:57,974 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 18 interpolants. [2021-10-05 21:13:57,974 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=52, Invalid=254, Unknown=0, NotChecked=0, Total=306 [2021-10-05 21:13:57,974 INFO L87 Difference]: Start difference. First operand 36 states and 66 transitions. Second operand has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:58,298 INFO L144 Difference]: Subtrahend was deterministic. Have not used determinization. [2021-10-05 21:13:58,299 INFO L93 Difference]: Finished difference Result 48 states and 87 transitions. [2021-10-05 21:13:58,299 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 18 states. [2021-10-05 21:13:58,299 INFO L78 Accepts]: Start accepts. Automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) Word has length 18 [2021-10-05 21:13:58,299 INFO L84 Accepts]: Finished accepts. some prefix is accepted. [2021-10-05 21:13:58,300 INFO L225 Difference]: With dead ends: 48 [2021-10-05 21:13:58,300 INFO L226 Difference]: Without dead ends: 0 [2021-10-05 21:13:58,300 INFO L781 BasicCegarLoop]: 0 DeclaredPredicates, 37 GetRequests, 11 SyntacticMatches, 0 SemanticMatches, 26 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 176 ImplicationChecksByTransitivity, 372.2ms TimeCoverageRelationStatistics Valid=136, Invalid=620, Unknown=0, NotChecked=0, Total=756 [2021-10-05 21:13:58,300 INFO L82 GeneralOperation]: Start minimizeSevpa. Operand 0 states. [2021-10-05 21:13:58,301 INFO L88 GeneralOperation]: Finished minimizeSevpa. Reduced states from 0 to 0. [2021-10-05 21:13:58,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand has 0 states, 0 states have (on average 0.0) internal successors, (0), 0 states have internal predecessors, (0), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:58,301 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 0 states to 0 states and 0 transitions. [2021-10-05 21:13:58,301 INFO L78 Accepts]: Start accepts. Automaton has 0 states and 0 transitions. Word has length 18 [2021-10-05 21:13:58,301 INFO L84 Accepts]: Finished accepts. word is rejected. [2021-10-05 21:13:58,301 INFO L470 AbstractCegarLoop]: Abstraction has 0 states and 0 transitions. [2021-10-05 21:13:58,301 INFO L471 AbstractCegarLoop]: INTERPOLANT automaton has has 18 states, 17 states have (on average 1.7647058823529411) internal successors, (30), 17 states have internal predecessors, (30), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2021-10-05 21:13:58,301 INFO L276 IsEmpty]: Start isEmpty. Operand 0 states and 0 transitions. [2021-10-05 21:13:58,301 INFO L282 IsEmpty]: Finished isEmpty. No accepting run. [2021-10-05 21:13:58,304 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0ASSERT_VIOLATIONERROR_FUNCTION [2021-10-05 21:13:58,304 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr0INUSE_VIOLATION [2021-10-05 21:13:58,305 INFO L764 garLoopResultBuilder]: Registering result SAFE for location ULTIMATE.startErr1INUSE_VIOLATION [2021-10-05 21:13:58,331 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true (64)] Forceful destruction successful, exit code 0 [2021-10-05 21:13:58,505 WARN L452 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69,64 /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 -smt2 -in SMTLIB2_COMPLIANT=true [2021-10-05 21:13:58,512 INFO L229 ceAbstractionStarter]: Analysis of concurrent program completed with 1 thread instances [2021-10-05 21:13:58,512 INFO L179 ceAbstractionStarter]: Computing trace abstraction results [2021-10-05 21:13:58,513 INFO L202 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CFG 05.10 09:13:58 BasicIcfg [2021-10-05 21:13:58,513 INFO L132 PluginConnector]: ------------------------ END TraceAbstraction---------------------------- [2021-10-05 21:13:58,514 INFO L113 PluginConnector]: ------------------------Witness Printer---------------------------- [2021-10-05 21:13:58,514 INFO L271 PluginConnector]: Initializing Witness Printer... [2021-10-05 21:13:58,514 INFO L275 PluginConnector]: Witness Printer initialized [2021-10-05 21:13:58,515 INFO L185 PluginConnector]: Executing the observer RCFGCatcher from plugin Witness Printer for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 05.10 09:12:21" (3/4) ... [2021-10-05 21:13:58,518 INFO L137 WitnessPrinter]: Generating witness for correct program [2021-10-05 21:13:58,525 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread1 [2021-10-05 21:13:58,525 INFO L354 RCFGBacktranslator]: Ignoring RootEdge to procedure thread2 [2021-10-05 21:13:58,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 14 nodes and edges [2021-10-05 21:13:58,530 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 3 nodes and edges [2021-10-05 21:13:58,531 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 2 nodes and edges [2021-10-05 21:13:58,531 INFO L910 BoogieBacktranslator]: Reduced CFG by removing 1 nodes and edges [2021-10-05 21:13:58,572 INFO L141 WitnessManager]: Wrote witness to /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/witness.graphml [2021-10-05 21:13:58,573 INFO L132 PluginConnector]: ------------------------ END Witness Printer---------------------------- [2021-10-05 21:13:58,574 INFO L168 Benchmark]: Toolchain (without parser) took 97910.08 ms. Allocated memory was 54.5 MB in the beginning and 362.8 MB in the end (delta: 308.3 MB). Free memory was 30.6 MB in the beginning and 154.1 MB in the end (delta: -123.5 MB). Peak memory consumption was 187.9 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,575 INFO L168 Benchmark]: CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory was 27.1 MB in the beginning and 27.1 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. [2021-10-05 21:13:58,575 INFO L168 Benchmark]: CACSL2BoogieTranslator took 256.60 ms. Allocated memory is still 54.5 MB. Free memory was 30.3 MB in the beginning and 33.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,579 INFO L168 Benchmark]: Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 54.5 MB. Free memory was 33.4 MB in the beginning and 31.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,580 INFO L168 Benchmark]: Boogie Preprocessor took 29.20 ms. Allocated memory is still 54.5 MB. Free memory was 31.9 MB in the beginning and 30.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,580 INFO L168 Benchmark]: RCFGBuilder took 610.53 ms. Allocated memory is still 54.5 MB. Free memory was 30.6 MB in the beginning and 32.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,581 INFO L168 Benchmark]: TraceAbstraction took 96897.83 ms. Allocated memory was 54.5 MB in the beginning and 362.8 MB in the end (delta: 308.3 MB). Free memory was 32.4 MB in the beginning and 157.2 MB in the end (delta: -124.7 MB). Peak memory consumption was 184.8 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,581 INFO L168 Benchmark]: Witness Printer took 58.79 ms. Allocated memory is still 362.8 MB. Free memory was 157.2 MB in the beginning and 154.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. [2021-10-05 21:13:58,584 INFO L339 ainManager$Toolchain]: ####################### End [Toolchain 1] ####################### --- Results --- * Results from de.uni_freiburg.informatik.ultimate.core: - StatisticsResult: Toolchain Benchmarks Benchmark results are: * CDTParser took 0.24 ms. Allocated memory is still 41.9 MB. Free memory was 27.1 MB in the beginning and 27.1 MB in the end (delta: 28.0 kB). There was no memory consumed. Max. memory is 16.1 GB. * CACSL2BoogieTranslator took 256.60 ms. Allocated memory is still 54.5 MB. Free memory was 30.3 MB in the beginning and 33.4 MB in the end (delta: -3.1 MB). Peak memory consumption was 7.7 MB. Max. memory is 16.1 GB. * Boogie Procedure Inliner took 42.93 ms. Allocated memory is still 54.5 MB. Free memory was 33.4 MB in the beginning and 31.9 MB in the end (delta: 1.6 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Boogie Preprocessor took 29.20 ms. Allocated memory is still 54.5 MB. Free memory was 31.9 MB in the beginning and 30.8 MB in the end (delta: 1.1 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * RCFGBuilder took 610.53 ms. Allocated memory is still 54.5 MB. Free memory was 30.6 MB in the beginning and 32.9 MB in the end (delta: -2.3 MB). Peak memory consumption was 10.5 MB. Max. memory is 16.1 GB. * TraceAbstraction took 96897.83 ms. Allocated memory was 54.5 MB in the beginning and 362.8 MB in the end (delta: 308.3 MB). Free memory was 32.4 MB in the beginning and 157.2 MB in the end (delta: -124.7 MB). Peak memory consumption was 184.8 MB. Max. memory is 16.1 GB. * Witness Printer took 58.79 ms. Allocated memory is still 362.8 MB. Free memory was 157.2 MB in the beginning and 154.1 MB in the end (delta: 3.0 MB). Peak memory consumption was 2.1 MB. Max. memory is 16.1 GB. * Results from de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: - StatisticsResult: PetriNetLargeBlockEncoding benchmarks Lipton Reduction Statistics: ReductionTime: 3218.9ms, 77 PlacesBefore, 23 PlacesAfterwards, 76 TransitionsBefore, 18 TransitionsAfterwards, 432 CoEnabledTransitionPairs, 6 FixpointIterations, 41 TrivialSequentialCompositions, 15 ConcurrentSequentialCompositions, 3 TrivialYvCompositions, 4 ConcurrentYvCompositions, 4 ChoiceCompositions, 67 TotalNumberOfCompositions, 452 MoverChecksTotal, Independence Relation Statistics: CachedIndependenceRelation.Independence Queries: [ total: 439, positive: 437, positive conditional: 0, positive unconditional: 437, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , CachedIndependenceRelation.Statistics on underlying relation: UnionIndependenceRelation.Independence Queries: [ total: 282, positive: 280, positive conditional: 0, positive unconditional: 280, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , UnionIndependenceRelation.Statistics on underlying relations: [ SyntacticIndependenceRelation.Independence Queries: [ total: 282, positive: 279, positive conditional: 0, positive unconditional: 279, negative: 3, negative conditional: 0, negative unconditional: 3, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Independence Queries: [ total: 3, positive: 1, positive conditional: 0, positive unconditional: 1, negative: 2, negative conditional: 0, negative unconditional: 2, unknown: 0, unknown conditional: 0, unknown unconditional: 0] , SemanticIndependenceRelation.Query Time [ms]: [ total: 13, positive: 5, positive conditional: 0, positive unconditional: 5, negative: 8, negative conditional: 0, negative unconditional: 8, unknown: 0, unknown conditional: 0, unknown unconditional: 0] ], Cache Queries: [ total: 439, positive: 157, positive conditional: 0, positive unconditional: 157, negative: 0, negative conditional: 0, negative unconditional: 0, unknown: 282, unknown conditional: 0, unknown unconditional: 282] , Statistics on independence cache: Total cache size (in pairs): 24, Positive cache size: 24, Positive conditional cache size: 0, Positive unconditional cache size: 24, Negative cache size: 0, Negative conditional cache size: 0, Negative unconditional cache size: 0 - StatisticsResult: ErrorAutomatonStatistics NumberErrorTraces: 0, NumberStatementsAllTraces: 0, NumberRelevantStatements: 0, 0.0ms ErrorAutomatonConstructionTimeTotal, 0.0ms FaulLocalizationTime, NumberStatementsFirstTrace: -1, TraceLengthAvg: 0, 0.0ms ErrorAutomatonConstructionTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeAvg, 0.0ms ErrorAutomatonDifferenceTimeTotal, NumberOfNoEnhancement: 0, NumberOfFiniteEnhancement: 0, NumberOfInfiniteEnhancement: 0 - PositiveResult [Line: 72]: call to reach_error is unreachable For all program executions holds that call to reach_error is unreachable at this location - StatisticsResult: Ultimate Automizer benchmark data with 1 thread instances CFG has 5 procedures, 89 locations, 3 error locations. Started 1 CEGAR loops. OverallTime: 96691.1ms, OverallIterations: 70, TraceHistogramMax: 3, EmptinessCheckTime: 59.1ms, AutomataDifference: 20230.2ms, DeadEndRemovalTime: 0.0ms, HoareAnnotationTime: 0.0ms, InitialAbstractionConstructionTime: 3284.5ms, PartialOrderReductionTime: 0.0ms, HoareTripleCheckerStatistics: 2099 SDtfs, 4985 SDslu, 11027 SDs, 0 SdLazy, 11551 SolverSat, 646 SolverUnsat, 0 SolverUnknown, 0 SolverNotchecked, 6754.3ms Time, PredicateUnifierStatistics: 0 DeclaredPredicates, 1986 GetRequests, 556 SyntacticMatches, 0 SemanticMatches, 1430 ConstructedPredicates, 0 IntricatePredicates, 0 DeprecatedPredicates, 8156 ImplicationChecksByTransitivity, 20519.1ms Time, 0.0ms BasicInterpolantAutomatonTime, BiggestAbstraction: size=122occurred in iteration=58, InterpolantAutomatonStates: 976, traceCheckStatistics: No data available, InterpolantConsolidationStatistics: No data available, PathInvariantsStatistics: No data available, 0/0 InterpolantCoveringCapability, TotalInterpolationStatistics: No data available, 0.0ms DumpTime, AutomataMinimizationStatistics: 346.7ms AutomataMinimizationTime, 70 MinimizatonAttempts, 2032 StatesRemovedByMinimization, 64 NontrivialMinimizations, HoareAnnotationStatistics: No data available, RefinementEngineStatistics: TRACE_CHECK: 421.0ms SsaConstructionTime, 2028.3ms SatisfiabilityAnalysisTime, 24735.0ms InterpolantComputationTime, 2082 NumberOfCodeBlocks, 2082 NumberOfCodeBlocksAsserted, 194 NumberOfCheckSat, 1949 ConstructedInterpolants, 0 QuantifiedInterpolants, 21918 SizeOfPredicates, 180 NumberOfNonLiveVariables, 6681 ConjunctsInSsa, 1612 ConjunctsInUnsatCore, 133 InterpolantComputations, 7 PerfectInterpolantSequences, 1/497 InterpolantCoveringCapability, INVARIANT_SYNTHESIS: No data available, INTERPOLANT_CONSOLIDATION: No data available, ABSTRACT_INTERPRETATION: No data available, PDR: No data available, ACCELERATED_INTERPOLATION: No data available, SIFA: No data available, ReuseStatistics: No data available - AllSpecificationsHoldResult: All specifications hold 1 specifications checked. All of them hold RESULT: Ultimate proved your program to be correct! [2021-10-05 21:13:58,640 INFO L540 MonitoredProcess]: [MP /storage/repos/ultimate-2/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:2000 (1)] Forceful destruction successful, exit code 0 Received shutdown request...